ITunes gone-then after reinstall-won't open-error msg "unknown error (-50)"

While running, iTunes disappeared; then reinstalled; now states: "The iTunes application could not be opened. An unknown error occurred (-50)."
Also, keep getting msg that "parts of QuickTime are out-of-date. Updating to latest version could help this." We have, and still get that msg. Help -- can't access songs for ipod...!!!

You might be getting two different problems here at once, Wendy. The (-50) could be a problem with your Apple Application Support or possibly an iTunes library file issue. The QuickTime message usually indicates old QuickTime componentry lurking in unorthodox locations on the PC.
We'll start work on the (-50) first. First we'll try working out if it's an AAS issue or a library file issue. (This isn't going to be a cure in itself, but it should eliminate one or the other of the possibilities.)
Head into your user accounts control panel and create a new user account with full administrative rights.
Now log out of your usual user account, and log into the new account. (Don't use fast user switching to move between accounts.)
Now try launching iTunes in the new user account. Does it eventually open to a blank library screen, or do you get another (-50) instead?

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ITunes crashes seconds after I try to open it. No error message at all.

Hello,
I have used iTunes for a long time and everything has been great, until now. Everything was working fine last night, but today when I try to open it an hour-glass appears for a few seconds and then disappears. No error message, nothing. It acts like I never double-clicked it. Help please!
My first idea is to go to Apple and download/install iTunes again, but I'm afraid I will lose my library. I know you dont normally lose anything when doing this, but since I'm doing this because there IS a problem I'm worried.
Any ideas? Windows XP, iTunes 6
Thank you

Okay, let's check the Processes tab of the Windows Task Manager in the following manner.
1 - reboot your computer,
2 - open the Task Manager,
3 - go to the Processes tab and then try starting iTunes,
4 - can you now tell us if iTunes.exe appears on the Processes list. If so, does it remain in the list or discontinue after a brief period of time?
In the interests of saving some time, here's the next step if iTunes.exe appears and remains in the Processes list. (If it discontinues after a brief period of time or doesn't appear at all, post back and we can take things from there.)
If iTunes.exe stays in the Processes list, let's try deleting the iTunes configuration file as described in this article in the Apple Knowledge Base.

After iTunes 10.6 update, program won't open

I just downloaded the iTunes 10.6 update and now my iTunes will not open. The icon in my dock will jump a few times, as if the program were opening, but then nothing happens. Any fixes?

I am having exactly the same problem. More specifically, after not loading, it comes up with the following message:
"The iTunes application could not be opened. An unknown error occurred (13010)."
Can anybody help?

HT201210 Just updates itunes software on my windows PC and now it won't open because of Runtime error R6034 can you help?

Just updated itunes software on my windows PC and now it won't open because of Runtime error R6034 can you help?

Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later)
Remove all of these items in the following order:
iTunes
Apple Software Update
Apple Mobile Device Support (if this won't uninstall move on to the next item)
Bonjour
Apple Application Support
Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.
The uninstall and reinstall process will preserve your iTunes library and settings, but ideally you would back up the library and your other important personal documents and data on a regular basis. See this user tip for a suggested technique.
Please note:
Some users may need to follow all the steps in whichever of the following support documents applies to their system. These include some additional manual file and folder deletions not mentioned above.
HT1925: Removing and Reinstalling iTunes for Windows XP
HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8
tt2

ITUNES WON'T OPEN AND GIVES AN ERROR MESSAGE HELP

my iTunes won't open, and instead pops up a window saying:
"The iTunes application could not be opened. An unknown error occured (-200)."
Something similar to this is happening with my mac DVD player. When I try to open that, it won't open and says:
"There was an initialization error. The audio output device could not be found. Please make sure speakers or an appropriate output device is connected. [-70027]"
doesn't come in to handy when you are about to watch a new episode of Lost .
anyway, I saw the speaker thing and went online. Any sound online (music, popups) can all make sounds - so my computer isnt permanetly muted. I've also restarted my computer, done the system updates, and gone into system prefereces to mess around with the volume. The computer recognizes the internal speakers. HELP!

Hey,
Here are the steps that should help:
1. Close all applications.
2. Go into the Finder>Home>Library>Preferences
3. Delete 'com.apple.iDVD.plist' and 'com.apple.iTunes.plist'
4. Restart Immediatley.
This should work. Cheers, Ricky.

HT4796 After migrating all of my adobe software (Cs4, cs5, etc.) to my new imac, the software won't open due to many errors. Any help on this?

After migrating all of my adobe software (Cs4, cs5, etc.) to my new imac, the software won't open due to many errors. Any help on this?

Welcome to the Apple Support Communities
Adobe software is conflictive when you use Migration Assistant because their applications don't work properly after migration. If you keep the DVDs or the installers of your software, use them to reinstall all your Adobe applications and they should start working correctly

HT201263 I went to do the latest update on my iphone 4s, and it said to connect to itunes so I did and continued to click restore and then it updated my phone through itunes. Then after about 40 minutes of it updating it still has the connect to itunes sc

I went to do the latest update on my iphone 4s, and it said to connect to itunes so I did and continued to click restore and then it updated my phone through itunes. Then after about 40 minutes of it updating it still has the connect to itunes screen on. It won't go away and I have tried restarting and turning off my phone various ways various times. I don't know what to do!

Once the Device is asking to be Restored with iTunes... it is too late to save anything... and you must continue with the Recovery...
See Here > http://support.apple.com/kb/HT1808
You may need to try this More than Once... Be sure to Follow ALL the Steps...
Take your time... Pay particular attention to Steps 3 and 4.
After you have Recovered your Device...
Re-Sync your Content or Restore from the most recent Backup...
Restore from Backup > http://support.apple.com/kb/ht1766
Note:
Make sure you have the Current Version of iTunes Installed on your computer
iTunes free download from www.itunes.com/download

I am from Bangladesh. I can't log in with my gmail Apple ID. When I put in the mail and password, and press sign in, it says it has to review on iTunes. Then I am directed to opening a new account. But why should I , since I have one. Plz help :(

I am from Bangladesh. I can't log in with my gmail Apple ID. When I put in the mail and password, and press sign in, it says it has to review on iTunes. Then I am directed to opening a new account. But why should I , since I have one. Plz help

Hi Ishrak,
I apologize, I'm a bit unclear on exactly what you are trying to log into with your Apple ID, or what exactly you are seeing (alert message, directions, etc) when you try to do so. If you continue to have issues with your Apple ID, you may find one or more of the articles linked from the following page helpful:
Apple ID - Apple Support
Regards,
- Brenden

Hey plz help me out!! i am using macbook pro 10.5.8..... and was using photobooth...and then after some time i opened it and there was no green light on cam, and it displayed nothing! plz tell me how to fix it! i want to see my face again!!! plz help me

hey plz help me out!! i am using macbook pro 10.5.8..... and was using photobooth...and then after some time i opened it and there was no green light on cam, and it displayed nothing! plz tell me how to fix it! i want to see my face again!!! plz help me

iSight troubleshooting
http://support.apple.com/kb/HT2090

A friend of mine downloaded an app from the internet onto my iPod Touch 4 so I could play pokemon on my iPod, I deleted the app but now iTunes and the App Store won't open, they say that the certificate for this server is invalid. What should I do?

A friend of mine downloaded an app from the internet onto my iPod Touch 4 so I could play pokemon on my iPod, I deleted the app but now iTunes and the App Store won't open, they say that the certificate for this server is invalid. What should I do?

Try:
Why does my iPod 4th generation say the certificate for this server is invalid when trying to access iTunes? I've never had an issue until this recently.

Os lion crashing on mac pro now and then after startup trying to open first app

Os lion crashing on mac pro now and then after startup trying to open first app like safari, nothing seems to respond then I restart it and its ok. Then after many uses it does it again.

Take it to an Apple Store.
Claypool Addict wrote:
I've tried holding r, command + option + p + r, option + r, c.
That command does nothing.
Try option/command/R
Don't press it until you hear the chime, don't release it until you see recovery loading, don't press other random combinations unless you know what they do.

TS1441 when i pluged my ipod classic 5g to PC then it shows "iTunes has detected an iPod in recovery mode. you must restore this iPod before it can be used with iTunes"?then after restoring the PIOD when IPod restarted then Itunes again detect the same ER

when i pluged my ipod classic 5g to PC then it shows “iTunes has detected an iPod in recovery mode. you must restore this iPod before it can be used with iTunes”?then after restoring the PIOD when IPod restarted then Itunes again detect the same ERROR.

If you are using XP, and you went through the procedure at the bottom of the previously linked document to change the iPod's assigned drive letter, and you also tried putting it into Disk Mode...
If you have not already, try shutting down your computer and disconnecting all USB devices, including hub. Start up with only standard keyboard and mouse connected. Just to be safe, put the iPod into Disk Mode again
http://support.apple.com/kb/HT1363
Run iTunes. Connect iPod to a direct USB port on computer. iTunes may prompt you about "recovery" and ask you to do a Restore. Try to do a Restore again.

I cannot open my Itunes? I keep getting this message: "The Itunes app could not be opened. An unknown error occurred. (-50) Help! I have also tried to uninstall and reinstall, but get the message that ITunes.msi cannot be found.

Why am I getting this message when I try to open my ITunes: "The Itunes app could not be opened. An unknown error occurred (-50)."?

http://support.apple.com/kb/TS3694#error14
These errors are typically resolved by performing one or more of the steps listed below:
Perform USB isolation troubleshooting, including trying a different USB port directly on the computer. See the advanced steps below for USB troubleshooting.
Put a USB 2.0 hub between the device and the computer.
Try a different USB 30-pin dock-connector cable.
Eliminate third-party security software conflicts.
There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry. Your default packet size being set incorrectly can cause this error. Contact the manufacturer of the software that installed the packet-size modification for assistance. Or, follow this article by Microsoft: How to reset Internet Protocol (TCP/IP) to reset the packet size back to the default for Windows.
Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.
Try to restore from another known-good computer and network.

ITunes application could not be opened. An unknown error occurred (0x666D7

Been using iTunes 6 and 6.5 for months and months on my computer. Upgraded to 7.0. Installs just fine. No errors, no issues.
At the end, it asks if it can launch iTunes 7.0 and I click okay. I get this:
The iTunes application could not be opened. An unknown error occurred (0x666D743F).
Apple, HELP!!!! I can't use iTunes at all!!!! I'd be willing to reinstall 6 or 6.5 if I could find it somewhere.
Can someone please help?

This happened to me as well. I uninstalled iTunes 7 and tried again: nothing. I uninstalled iTunes 7 and Quicktime and tried again: nothing. I uninstalled everything and ran a third-party program called CCleaner to find registry entries that were not removed by the uninstallation and then reinstalled: nothing. Did all that and add a reboot after CCleaner before reinstalling: nothing. Downgraded back to iTunes 6.0.5 and it worked fine. Re-upgraded to iTunes 7, failure.
For those who may need it, you can download iTunes 6.0.5 from apple.com here: http://www.apple.com/support/downloads/itunes605forwindows.html

Itunes wont open, I get "itunes application could not be opened. An unknown error occurred (-50)"

I'm on Windows 7 - using itunes daily without problems and suddenly itunes wont open, I get "itunes application could not be opened. An unknown error occurred (-50)" The only thing I can think is I think there was a download in progress when I shut down the computer.
I tried uninstalling and reinstalled, but I get the same thing. I tried clearing the itunes folder and reinstalling, same thing. help!

Doublechecking. When you did the complete uninstall, were you using the following document as a guide?
Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7
(If damaged program files are involved here, a standard install might not remove them, and a reinstall might not then replace them. So the Verify iTunes and related components are completely uninstalled section is an important step.)

ITunes gone-then after reinstall-won't open-error msg "unknown error (-50)"

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