Annoying "unknown device&qu

I own an Audigy 2 zs notebook. It works like a charm (at the moment I have the driver and software from this thread installed http://forums.creative.com/showthread.php?t=24260)
Everytime I boot up though, I get a message that an "unknown device" needs to be installed. When I press don't ask again, it will ask again anyway, when I press install, it looks on windows update for drivers and identifies the device as "Creative SoundFont Synthesizer" it then tells me that there was an error installing the drivers and history repeats itself over and over again.
I thought that disabling the device might do the trick, but the result of that is just that the windows audio service doesn't boot with windows any more and that I don't get any sound even with my built in audio card. The only way of getting things back to normal again after that is a rollback from a system restore point.
Any ideas how to fix this At the moment I just click cancel everytime the message pops up, but it's probably slowing down my boot time, too.

Before USB took off, PC joysticks used a serial interface and required hardware to convert the analogue movement of the stick to a digital value to be used by the PC. Some bright spark realised that the sound card already has DAC/ADC converters built in so an additional connection was soon added to many cards allowing them to double up as joystick/gamepad connectors.
As MIDI is also serial data, it wasn't long before the same port was being used for MIDI connection and was a very cheap and useful extra. One of the areas where PC's lagged behind Apple and even Atari PCs was in music production so this was quite a big deal at a time when there were no PC based virtual instruments and home keyboards and synths were the biggest selling gadgets in town.
In the last few years USB has been adopted as a means of transfering MIDI data although this is far from uni'versal and actually has a number of weaknesses when compared against the traditional MIDI connection. Despite this, M$ decided to remove OS level support for the gameport with no thought for the millions of MIDI users around the world - they were only thinking of game players - like much of the PC market.
In actual fact, the MIDI ports still work under Vista but can't be configured without dabbling in the registry. Programs such as Cubase can still use them so it's not a total loss. It is possible to purchase a MIDI>>USB adaptor but this just introduces additional problems and costs. There hasn't been any response from M$ as to why they can't re-instate support so the issue will never go away.
If you don't use MIDI or non-USB game controllers you can either ignore the Device Manager entry or right click it and select "Disabled" to make it look tidier.
Here endeth the lesson :-)
Pete

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My iphone 4s keeps coming up as unknown device since i upgraded to ios 7. it will not activate

ive got an iphone 4s which worked fine before i upgraded to ios 7. now it is stuck at the activation screen because it keeps telling me my device is unknown. i have tried activating it over wifi and through itunes but no luck, itunes tells me that there is a problem with the device and to contact a service centre. it has an active sim card in and all worked fine before, now i have a very expensive paperweight and im getting very annoyed. apple want £25 just to talk to me which i am not paying as i think its ridulous that i have to pay for thier **** up. does anyone have any adive or had this problem before?

Ok I just got pass the error CONNECT TO iTUNES and UNKNOWN DEVICE. I can not gurentee this will work for anyone else. This is what I did and it worked out:
CONNECT TO iTUNES error
1. I removed the sim card and put the device on charge for several hours, the display switch between the Apple logo and the connet to iTunes logo.
2. I launched iTunes and connect the device to the computer while the display was on the Apple Logo (not connet to iTunes logo).
3. I put the device in DFU while still on the Apple logo.
4. I forced a deliberate error while attempting to restore by selecting a older iOS firmware (iOS 6) and click restore (I got the error, maybe this step does nothing but things changed from here).
5.At this point the device remained in DFU mode and restored to the current iOS 7.0.4 firware.
UNKNOWN DEVICE error
6. After restore the device went into searching, at this point I put the the sim card into the phone
7. Select Language and Country, the device error Unknow Device (this might be as far as you can go).
8. I took the sim card out and let the phone rest. After an hour or so the device completed the search and read No Sim.
9. I put the sim card back into the phone and the phone activated.
I tried evething online and nothing worked. This is what worked for me. Hope this helps, good Luck!

Fix for "Unknown Device" when the iPod is connected

After a few long nights, a few headaches, hours and hours of reading, thinking and many toasted sandwiches, I finally found the problem to my iPod not loading. Putting together information I had read here and at many other sites I had a brainwave... and sure enough it worked. I figure this may be helpful to many other iPod users, so... here I am posting my solution. Note though, this wont help all users, but I know I wasnt alone with this issue, and this just might help someone.
Ill list the issue I was having (this may help other people identify their issue to mine) was that the iPod failed to work on windows, and threw a fit when plugged in. Windows did too, iTunes would lock up and the iPod software failed to recognise that an iPod was connected. The iPod had worked on an older PCs before, but it failed to work on my new homebuilt PC. When I first connected the iPod it began to work, transferring and updating.. but then it unexpectedly disconnected the iPod.. and mentioned something to do with an I/O error, the iPod had to be disconnected and it also mentioned something to do with a timeout error and dataloss (or as it put it Data has been destroyed. Thats always a pleasant message to read). Suddenly, half the music on my iPod wouldn't play, it skipped songs until it found a song it would play... really annoying. I tried to format the iPod using the iPod software... buuut it told me that it wasnt an iPod that was connected (Funny that... lol). After the first iPod crash, it would react differently when connected. It would once again pop up with the Found new hardware bubble, Apple iPod..., Disk Drive... ... then iTunes loads... then iTunes freezes... then the iPod disconnects 2 mins later, then iTunes unfreezes. THEN the next time the iPod is connected, it would say it was an Unknown device, and that it has Malfunctioned.
It seems that, oddly enough, my iPod (I own the 30gig iPod Photo) does not like USB 2.0... Im thinking that it must not support some of the device commands the PC is sending to it... Weird though, because on other USB 2.0 PCs it worked fine. (I got the best results out of Dell PCs...). IF USB 2.0 is disabled and slows to USB 1.1 the iPod works a charm... jumped up without an issue in the world. To disable USB 2.0, jump into BIOS as your pc is in its POST stages... this being, when the PC is first turned on and presents a message such as Press DEL to enter setup (or something similar), do so. Then refer to your manual on how to disable USB 2.0, if possible. Apply the changes and reboot. Be sure not to mess around with other settings, it is very easy to mess up your computer if you change settings you are not familiar with.
Other solutions would be to run the iPod via Firewire... if you can get a cable. Run along to your local mac store and see if they have one in stock. Ill get back on here to post if using Firewire solved the issue later.
Perhaps a motherboard BIOS upgrade, or newer drivers could resolve the issue. This may explain to some people why their iPod stopped working overnight after working fine for so long, maybe an update of the sort was installed. Apparently my motherboard already has an update, so Ill test that sometime and post my results as I investigate further, but as for now Im just happy my iPod is working, even if it is taking ages to transfer (25 gigs of music takes awhile over USB 1.1 lol...).
Also, I might add that my motherboard is an ASUS P5P800 with the Intel 865PE chipset. It could be an interesting pattern seeing which motherboards do not seem to be compatible with the iPod at USB 2.0 speeds.
As long as this post was I hope that someone gets some use out of it. Ill post further findings as I investigate this matter further.
Happy iPodding!

hi Jazza!
the best explanation for this that i've seen is that there can be power drain problems in USB 2.0. drop below 500 mA running through the port and everything goes to pot. this may well explain why switching back to USB 1.1 sometimes works like a charm, and also explains why it's important to have the ipod plugged into a high powered USB port rather than a low power port.
i've seen a confirmed case of a USB connection going west after a scanner got plugged into the beast in question ... periodically i see other reports along these lines, too.
Roger Whiteley, "USB Device Not Recognized" #16, 04:18am Aug 3, 2005 CDT
love, b

HOW TO FIX HD AUDIO/UNKNOWN DEVICE/DEVICE WON'T START LENOVO H320 Win 7 64-bit

Fix for - HD Audio devices won't start or you can't load correct driver. Lenovo H320 - Win 7 64-bit I-3 processor. 5 series/3400 chipset
Here is a working procedure to fix the problem when you install windows 7 64-bit and can't get the correct drivers installed for the HD Audio devices 1)Realtek AC97 HD Audio device id = HDAUDIO\FUNC_01&VEN_10EC&DEV_0662&SUBSYS_17AA3604&REV_1001
and 2)Intel HD Audio device id = HDAUDIO\FUNC_01&VEN_8086&DEV_2804&SUBSYS_80860101&REV_1000 Regards >>> Sucromatic
For an IBM LENOVO 320 with Windows 7 64-bit Home Premium Version download these drivers to a directory in a second partition to prevent this nightmare from happenning in the future.
1)AC 97 high def audio version
Realtek HDA 2.67found on http://wikidrivers.com/wiki/Main_Page or at www.realtek.comon right of screen on homepage and
2) Intel HD GRAPHIC and HD Audio version
Intel GMA 15.22.52.2559 (Vista/7) 14.46.8.5387 (XP)
found on
http://wikidrivers.com/wiki/Main_Page.
Select your OS and and whether 32 or 64 bit. I recommend the .exe version as it works very smoothly. Uninstall HD AUDIO DEVICE or whatever it is called maybe "unknown device" with ac97 device ID "HDAUDIO\FUNC_01&VEN_10EC&DEV_0662&SUBSYS_17AA3604&REV_1001." Afterwards install AC 97 HD Audio Driver.
After install reboot and wait till computer completely starts.
Now uninstall Intel HD Graphics or your graphics device. When you get the uninstall box open, select delete the driver software for this device and then OK. When prompted to reboot select NO and Immediately start the install of the Intel GMA driver. Which installs both the Graphics Adapter and the Intel HD Audio. Reboot when finished and all HD Audio devices will be functional (hopefully). You will now have these versions installed. As shown in device manager/device properties/Driver tab
Now uninstall Realtek AC97 driver you first installed to delete annoying Red Lexmark/realtek icon in Notification area (If your computer shows it after reboot) and windows driver update will install a microsoft driver (shown below)that works without the stupid lexmark red icon. See below. You will now have these versions installed. As shown in device manager/device properties/Driver tab
High Definition Audio Device
Driver Provider: Microsoft
Driver Date: 11/19/2010
Driver Version: 6.1.7601.17514
Digital Signer: Microsoft Windows
IntelR) HD Graphics
Driver Provider: Intel Corporation
Driver Date: 1/10/2012
Driver Version: 8.15.10.2622
Digital Signer: Microsoft Windows Hardware Compatibility Publisher
Intel (R) Display Audio
Driver Provider: Intel(R) Corporation
Driver Date: 8/23/2011
Driver Version: 6.14.0.3086
Digital Signer: Microsoft Windows Hardware Compatibility Publisher
Voila. Now go to intel and run a driver update scan and it will likely correctly identify your Intel pieces and offer downloads for any that are not current. Good Luck!

it is a user to user forum without any intervention from apple information-wise.I think this question appears and being discussed in another thread
http://discussions.apple.com/thread.jspa?threadID=2411685&tstart=0

Work-around to "unknown device" problem

I found a work-around to the "unknown device" problem, a pain to do, but much less painful than any alternatives I've found so far.
In my case, I can connect my Ipod one time. After I eject it, if I reconnect, I get the Unknown Device error. That's where this work-around comes in.
There is an INF file (a Windows hardware configuration file) in the Windows\INF directory that has a name that will be specific to your computer. Once you determine that file, you need to re-install it. Re-installing it allows the Ipod to be recognized the next time it is connected. These are the steps:
1) Determine the file name on your computer. You only need to do this one time, and then remember the name. Using Regedit, navigate to HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056-44455354 0000}. Then do an Edit / Find for "ipod" without the quotes, making sure that "Data" is checked and "Match whole string only" is not checked. It should find "Apple iPod USB Driver" in the "DriverDesc" value in one of the sub-keys. There will be another value called "InfPath". The data for that is the file name for the INF file on your computer. On my computer it is oem51.inf. It will be something like that on yours.
2) In Windows Explorer, go to C:\Windows\Inf and find that file. In addition to "oem??.inf", there will be an "oem??.pnf" (same numbers), which is a binary version of the .inf file. Delete that file, or rename it if you prefer. If it exists, step 3 will not work.
3) Right click on the .inf file and select Install. The computer will chug for a few seconds. The .pnf file should reappear and, more importantly, your iPod should now be able to connect one time. At least it does for me.
I hope that Apple puts out a fix for this problem sometime soon. Meanwhile, doing steps 2 and 3 every time I want to connect is annoying, but bearable.

I would like to apologize for posting this message. I promise that it did work and did seem to be the solution at the time I posted it, but it helps me no longer. My Ipod was recognized several consecutive times after I posted this with no work-around, but then it became an unknown device again, and there it stays, seemingly forever.
I am a highly skilled and experienced Windows system programmer, and this has me stumped. I apologize for any time that my message may have wasted for others. I have also tried every other solution that has been posted here and elsewhere, and none work.
I would recommend that Apple pay me a lot of money to find and fix this problem. Short of that, they should pay someone else to fix it. To have this many fatal problems for so many people should be considered unacceptable. Until a fix is available, I shall just be happy that I got as much onto my Ipod as I did before it became unavailable.

Unknown Device ins Port

I'm quite annoyed. I connect my ipod to several different computers to figure out the problem-but they all say 'Unknown Device in USB Root Hub' It doens't show up on itunes or anything-my ipod still works but I would like to put songs on it once in a while-it's really annoying...any help?? Please?? I really would like to fix this...

Hi:
You need to install the fingerprint sensor driver.
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=32...

KM3M-V Unknown devices in IDE ATA/ATAPI controllers

After installing I have two "Unknown devices" in the IDE ATA/ATAPI controllers entry of the Hardware Manager.
Every time the PC boots, it wants to locate drivers for the devices - which it can't since they're "unknown".
Anyone know how to correct this? I'm sure it's the primary and secondary channels, but why are they not identified by Windows
I've installed the drivers from the Motherboard CD, and from LiveUpdate

We're talking about the entries in the IDE ATA/ATAPI Controllers that usually read "Primary Channel" and "Secondary Channel".
The strange bit is, that although the controllers are "Unknown", the devices themselves (HDD, CD-ROM and CD-Writer) works fine.
It is just a bit annoying to have to cancel the two "Unknown" devices each time the machine boots.
Re-installing the mainboard drivers has no effect.

Unknown Device!!!! HELP!!!!

I already have the software installed, and I know that my usb ports work because i've used them in the past with other hardware. I just bought my ipod today, and when I plug it in a little symble thats the same as the one beside of the usb port pops up, when clicke on, it says unknown device. I can't even access it so much as to format it. Any help whatsoever would be greatly appreciated. I don't want to have wasted this money. And I'm on a PC btw.

I've got the same problem... I'll list all the details..
I have an iPod Photo 30 gig.. worked fine on my old computer, plugged it in and it was great, not a problem in the world.
I then put together a new PC, 3.0Ghz P4... and installed windows and put it all together again. I restored my database from my old iTunes library. When I connected the iPod it worked... and began tranferring and updating.. but then it crashed.. and it mentioned something to do with an I/O error and that the iPod had to be disconnected, and it also mentioned something to do with a timeout error.
Suddenly, half the music on my iPod wouldn't play, it skipped skipped skipped... really annoying. I tried to format the iPod using the iPod software... buuut it told me that it wasnt an iPod that was connected. (Funny that... lol)
After working away at the problem I decided to format and try the iPod again... still no luck, and its really getting to me.
What happens now... is, you connect it, it says Found new hardware... Apple iPod... ... Disk Drive... ... then iTunes loads... then iTunes freezes... then the iPod disconnects 2 mins later, then iTunes unfreezes. Now it says the iPod is an unknown device, and that it has Malfunctioned.
This is really annoying me. Ive tried to download updates from Microsoft, but I cant. Theres an error in the validate thingo, Ill have to call them sometime, but thats irrelevant. Does anyone know a fix? Or... someone mentioned the firewire works... I have a firewire card... where can I buy the Firefire cable from? And... how can I contact apple for help, if I need to?
Annoying though, because the USB method worked like a charm before this. BTW this iPod still connects perfectly on other pcs... but it doesnt have the music library I want lol...
Sorry for the long post, but I figure the more detail the better. Any suggestions would be greatly appreciated. Thanks a heap!

'Unknown device' in Lenovo Solution Center, but not in Device Manager

Even with all the latest updates installed, I still get this annoying warning from Lenovo Solution Center
'Unknown device' - status 'not installed'
Control Panel / Device Manager gives no signals something is wrong.
why?!
Details:
Computer: Thinkpad Yoga (TPY)
OS: Windows 8.1 all updated
Lenovo Solution Center version: 2.2002 / revision 17630
External device attached to TPY: OneLink Pro (also has latest driver = Realtek 8.10.1009.2013)
Thanks in advance
Olof

henk wrote:
It seems to me you are missing some update from Lenovo. I had the same issue, however just recently after updating any available software/drivers for the TPY the message has disappeared.
Glad to hear the problem is solvable. Regarding missing updates, I honestly would not know which one.
Lenovo's own update programs ('L-Update and Drivers' & 'L-System Health and Diagnostics') inform me that all drivers are up to date.

ACPI\VPC2004 Unknown Device - Lenovo g560 windows 7 pro. x64 installed

I just bought Lenovo g560. And installed windows 7 pro. x64 and installed drivers from driver cd shipped with laptop (windows 7 drivers). After installed all drivers still I had one device unknown ; device id = Acpi\Vpc2004. In the Windows 7 solution center, there was message about download energycut and install. I downloaded and install energycut. But nothing changed and power management option program not working too.
I googled so much and couldn't find any solution.
+++
Actually there very interesting situation, there is any driver or support about lenovo g560 on lenovo global support site. And auto detect is not working too.
Did I made mistake to buy lenovo instead of thinkpad???
If somebody have solution about this acpi\vpn2004 driver please help.
Because like that when sleep or lid laptop not waking up.
After hibernate and start computer, having blue screen and system halted message. until start without resume system.
Solved!
Go to Solution.

I googled this: "ACPI\VPC2004 Unknown Device"
Third hit was THIS at another Lenovo forum.
Is this your solution?

Creative Zen 8Gb-Unknown Device!

Creative Zen 8Gb-Unknown Device!? Player: Creative Zen 8gb
Firmware Version: .20.02e
OS: Win XP with Service Pack 3 (Unknown Origin)
Windows Media Player: Version .0.572.545
Motherboard: ASUS P5Q PRO
My problem is that when I connect the player to my computer it is recognized as a Unknown Device and listed as Unknown Device in the Uni'versal Serial Bus Controller of Device Manager.
There is no yellow triangle, there is no section for Portable Devices. It simply registers as Unknown Device.
There is no apparent way to synch with the device. It does not show up in Creative Media Explorer, Windows Explorer or Windows Media Player.
The Original Creative CD installation package does not detect it.
The newest Creative XP installation package from official website does not detect it.
The newest Creative firmware installation package from official website does not detect it.
I have tried several USB slots from front and back (am using back mostly) and short black USB cable (0s long) as well as another USB cable. All USB ports are 2.0.
The player charges normally when connected to the computer and works perfectly for listening to music etc.
Help please! Im poor as hell and will go insane without this player :/

When I connect the Zen, that is where the change happens in the Device Manager trees. It is not recognised as Creative Zen, Portable Device or even a device with a yellow exclamation triangle.
In other words, when I plug in the player, that is how it is represented in the Device Manager trees. As an Unknown Device in the USB controller section.
For your information I have tried this player on 3 other systems.
Laptop A with Win XP/Service Pack 3/WMP
Laptop B with Win XP/Service Pack 3/WMP 0
Laptop C with Windows 7
RESULT IS ALWAYS SAME.
UNKNOWN DEVICE!
The player works fine in and of itself and charges normally when plugged.
Please confirm what are the system requirements for Firmware Version: .20.02e which is the currently installed version on my Creative Zen 8GB

I have the iPhone 3GS and I was updating to the IOS 5 version when at the end of the update it said updated failed. Now my phone is not recognized by my computer or any computer. The computer says it is a unknown device and my phone will not do anything.

Need help finding out what happened to my phone and what I can do. After trying to update my iPhone 3GS to IOS 5 my phone will no longer work and is an unknown device to any computer. It is like it wiped out everything on the iPhone and has no hardware or data on it. At the end of the download and update of IOS 5 it said there was an error during the process and gave me no option but to push ok and know phone is not working. The screen shows the USB plug and iTunes symbol, but computers will not recognize device.

What was the error number? That would be very useful since the following gives actions for various errors.
http://support.apple.com/kb/TS3694
Try manually placing the iPod in recovery mode to see if that will make the iPod visible in iTunes. See:
http://support.apple.com/kb/HT1808

Equium L10: Windows Vista Beta2 - unknown device

Hi
I have a Toshiba Equium L10 with Windows XP loaded as default but I installed VISTA Beta2 "public release" on it and given that it's only a 1.5GHz Celeron CPU with 512MB RAM, it ran extremely well but, I have one problem which I am hoping that I can get help with from the users in this forum and especially those who have the same/similar Equium model as I have?
Ok, after installing VISTA I checked in Device Manager and noticed "Unknown Device". After checking out the info given in it's properties, I have detailed it below:
Location: Microsoft ACPI Compliant Embedded Controller
Value: ACPI\ACPI 0001 * ACPI0002
When I re-installed XP again, I went to Device Manager/Batteries/Microsoft SMART Battery, the entry for Microsoft SMART Battery Subsystem has "ACPI\ACPI0002\6&28CA2229&0".
Notice the "ACPI0002" info given for the 'unknown device' in VISTA is the same info given for the "Microsoft SMART Battery Subsystem" in Windows XP. So I am left wondering if the unkown device under VISTA is the Microsoft SMART Battery Subsystem and if so, why did VISTA not install the driver for it?
Can anyone help with find a driver for the "unknown device" in VISTA?
Regards
Brave

Hi
The unknown device appears because the driver is missing.
Unfortunately, at this time you will not find any Toshiba supported drivers for the Windows Beta2. This is a beta version and not official on the market.
I think if this OS will be official supported so you will also find the needed drivers.

Windows needs to install driver software for your unknown device

Windows needs to install driver software for your unknown device
This is the message that i get when ever i plug in my ipod touch to my computer. the computer is running on vista. i dont know what to do, because i tried to follow the steps suggested, but it didnt work, the computer said that it couldnt find anything and to check with apple for some driver software. HELP!!!

The iPod touch and iPhone do not use the same type of USB drivers that other Apple devices use. They both require Apple Mobile Device Services to be running. Using this tech article as a guide, you can easily fix this: http://support.apple.com/kb/TS1567

Unknown Device ipod Classic and Windows Vista problem??

Help!! My ipod Classic is not being recognized by my computer. I have read the previous articles and tried the solutions but I continue to get the result "Windows has determined that the driver software is up to date" I continue to get the error noise when I plug the USB in and the Device manager continues to say "Unknown Device" It seems others are having this problem, how do I fix this?

I am having the same trouble with mine, and I can say that it isn't iTunes, I plugged my brothers iPod Nano in and it worked like a charm, but when I plugged my iPod Classic 160g in all it says is it is an "unknown divice". It isn't Vista either as the same thing happens on XP Pro as well, so all I can think of is it is a error on the Classic itself. I just wish someone can help out so that I can use my ipod!!!! Come on Apple!!!! Solve this problem!!!!

Annoying "unknown device&qu

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