100% CPU usage during downloads in iTunes 7

Wow, ever since I installed iTunes 7, my CPU stays pegged at almost 100% utilization during iTunes downloads. Downloading podcasts, songs, video, etc. all cause the CPU usage spike.
Running 2.26 Ghz P4 with 1 Gb RAM, 200 GB HD.
Even when I'm only getting about 200K/sec in data, CPU is pegged. Machine becomes very sluggish. Once the download is complete, CPU usage goes back to close to 1-3%.
Any ideas?
Dell Dimension 2400 Windows XP Pro Mac Mini PowerPC

I had to revert back to version 6.05. iTunes 7 on XP is unusable. I used to browse the web and do other productive things while my podcasts were downloading. Now the CPU is pegged so high, that I can barely get the machine to respond.
I installed iTunes 7 on my 1.42 GHz Power PC Mac Mini with only 512 Mb RAM. Downloading 3 large video podcasts at one time only pushes the CPU to 60%. One large download is around 20%. The machine is totally usable while downloading.
Looks like they got the Mac OS X version right and the XP version way wrong!
I'm sticking with version 6.05 on XP until they can fix these usability issues.

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High CPU usage when downloading from ITunes Match

When attempting to download matched songs from ITunes Match, ITunes utilization spikes to over 70% and makes it almost impossible to do any other function on the computer. Eventually ITunes fails to respond. I have tried several remedies including reseting winsock. Is there any other options I should try?

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

Upgrade to iTunes to 10.4.0.80 caused 100% CPU usage when I start iTunes. Task manager shows iTunes 50% mobile 50%. I am running Windows XP Professional sp3. iPhone 3 ios 4.3.5

I upgrade to iTunes 10.4.0.80. Since then iTunes uses 50% of the CPU and Mobile uses 50% CPU. I let it run for hours and the CPU usage stayed at 100%. The phone will partially sync but takes a very long time. This was not a problem before the iTunes upgrade. I am running iTunes on Windows XP professional SP3. It does not matter if the phone is connected to the USB port of the PC. When iTunes starts it runs the CPU at 100%.

Yes! I am not the only one with this problem. Ever since the latest iTunes update, the CPU runs up to 100% using both the mobiledevice and itunes itself. The store won't work either! I'm also on Windows XP. I too have tried everything I can think of but nothing has helped. I really hope they get an update out with fixes soon. This is really annoying!!

I have very high 100% CPU usage when I run itunes.

Normally I don't have any problems, but now when I start iTunes it eats up my CPUs. Any thoughts?

I am having this same problem. When running iTunes on my macbook pro, i notice my CPU usage is hovering around 94-97% constantly. Has anyone found out why?

My laptop (win7 2ghz, 1gig) has 100% cpu usage with itunes installed (even when not running itunes) since the upgrade. i had to uninstall. tried installing but still the same problem. my daughter wants the new ipad, but this is a serious problem.

when itunes upgraded my laptop went to 100% cpu usage. only solution was uninstall. have tried itunes again as my daughter wants the new ipad. still same problem tho so not keen to spend £400 on new pad without pc support. anyone help? (ps been using ipod touches 1 and 2, been great source of pleasure for my two girls, but cant sync them, so using the little shuffles for music, syncing to an old version of itunes on an old netbook - had the sense to switch off upgrades when the new version went wrong)

Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 & above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
http://support.apple.com/kb/TS4123?viewlocale=en_US

Music store & 100% CPU usage

I've had this problem on my newly built computer, and my older machine. When I browse the iTunes music store, the status bar on the top will often move like it's opening the music store, but it'll do this for a long period of time (several minutes) and iTunes will work, but the music store will not load, and you cannot click the 'X' to stop the contacting of the music store. During this time if you open task manager, iTunes uses 100% of CPU resources. If you close iTunes it still uses 100%. you have to end the process in task manager in order to make it stop. On occasion the music store will work to view maybe one album, but if you search for another album, or click another link it'll do the whole not-responding-100% CPU usage cycle again.
All drivers are up to date and like I said it's done this on two seperate computers of mine on the same iTunes account. I also have a laptop and the music store works completely fine on it. It's only on my desktops that I have this issue.
Some specs on my machine if this will help
Asus motherboard
AMD Athlon XP 4000+ processor
2gb Kingston 184 pin DDR ram
Seagate SATA II 160 GB HD
Windows XP PRO service pack 2
thanks for your help!

I'm only guessing here, but perhaps iTunes is having a conflict with another application. If you are anything like me you probably install your favourite applications on all your computers. As a shortcut to troubleshooting, perhaps consider an application you have installed on the desktops, but NOT on the laptop. Then try uninstalling that application from your desktop computer and test iTunes.
HP Compaq dx6120 P4 2.8 GHz 1GB RAM (BABYJANE) Windows XP iPod : 5G 30GB (BLANCHE)

Microsoft.Exchange.AddressBook.Service.exe 100% CPU Usage

Hi,
We have an exchange server 2010 and the Microsoft.Exchange.AddressBook.Service.exe used 100% CPU Usage suddenly. However, after rebooting the server, the CPU Usage of the above .exe is back to normal. Client cannot connect to the exchange server during
the high CPU Usage of the above .exe.
Any ideas for the above problems? Thank You.

Hi
Microsoft.Exchange.AddressBook.Service.exe is related to OAB function.
Maybe mobile or client fails to download will cause this problem.
What was the fix for this?

100% CPU usage with XP Cooler from PCAlert4

Any idea why I would be running 100% cpu usage when running XP Cooler from PCAlert4? I noticed PC was sluggish when running it so CTRL+ALT+DEL and under performance is 100% CPU with 245MB Ram Usage. No other TSR's running - several application but under 10% CPU usage without PCAlert and XP Cooler.
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Deathstalker (Richard),
I did what you suggest in memory management and also changed out the mem on the board - it did make a difference, not as much as I had hoped, but it did.
Raven,
I have used Fraps in the past, forgot about it, but went ahead and downloaded it to get a better look.
To the Both of you,
Thanks so much for your replies, sometimes it just takes someone outside looking in to see the things overlooked. But I went ahead and also ran all of the latest updates for the board (semi new system and I only installed with the CD that came with the Mobo) and everything is running better than expected. Thanks again for your thoughts - keep 'em flowin, it's amazing whom we could help. Take care.
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Distiller 8 and 9 both locking up, 100 % CPU usage

Not sure if its related, but probably, since it happened right after...I just transferred everything from my quad core mac pro to my new 8-core Mac Pro. Everything went well, but now Distiller 8 starts and then sits and gives the beachball of death, and one of the cores shows 100% cpu usage. (I have that utility that shows memory used, CPU usage, etc.). I hadn't bought Acrobat 9 yet so I downloaded it and installed, and Distiller 9 does the EXACT same thing. The ONLY thing I can call an "error message" is that I can see in the window after it launches is "Error in /Library/Application Support/Adobe PDF/Settings/PDFX4 2007.joboptions:/CheckCompliance out of Range."
That message may have been there whole time, even when it worked, though. I don't know. At any rate, I need distiller working! Any ideas?

Glad to hear all is well. Preference files can cause big problems. Eons
ago, in the 1980s, I used a communications program called Red Ryder. I
loved the program. After it was updated to a new version (it might have
been called White Knight by that time), I started to have terrible
problems. I wrote to their technical support. They couldn't duplicate
the problem. It couldn't happen etc. I eventually got a little hot under
the collar. After all, if I couldn't use my modem, I couldn't check my
email, etc. It turned out to be a problem with my preference file when
converted to the latest version, that was causing the problem. Since
they always started with a new preference file, they couldn't duplicate
the problem that was obvious to me.
...Mike

100% CPU usage by iCal

For some reason my iCal application uses 100% of CPU. What can I do to avoid it?

I had a similar problem with iTunes.
Here's the link to what fixed my problem immediately. Please note: my problem was resolved following just the three steps pasted below. The original link has additional steps that may be necessary, although I did not employ them, and my problem of 100% CPU USAGE is gone!!! Thank God!
URL source: http://www.hotcomm.com/faq/FAQ_ResetWinsock.asp
Good Luck
Copyright (c) 2009 1stWorks Corporation. All rights reserved.
This article gives instructions for resetting Winsock on Windows XP and Windows Vista:
Reset Winsock (Vista)
To reset Winsock in Vista:
1.Click the Windows Start button.
2. Type Cmd in the Start Search text box and press Ctrl-Shift-Enter (keyboard shortcut to run Command Prompt as Administrator). Click Continue to allow elevation request.
3. Type netsh winsock reset in the Command Prompt shell, and then press the Enter key.
URL source: http://www.hotcomm.com/faq/FAQ_ResetWinsock.asp

[10.1.2] Protected Mode causing 100% CPU Usage/Extra Processes on Win XP 32-bit?

Hello,
I'm not 100% sure if the two are related, but I have a client who was seeing 100% CPU usage using Adobe Acrobat Reader X 10.1.2 on Windows XP 32-bit and Firefox 11. The acrord32.exe process would hang around after closing the main window and eventually leading to tons of processes and his CPU at 100% use. I believe disabling Protected Mode may have solved this issue. I didn't see it documented anywhere so I figure I'd post about it here and see if anyone else was seeing this resolved as well.

I noticed 'only' 50 % CPU usage. Not during Reader usage with ~ 20 %, but it started after closing main window.
Two instances of acrord32.exe were created - the moment pdf was opened - of which one was using zero CPU.
After opening another pdf, 2 more processes were created, so 4 in total. Have seen 2 of them using 100 %.
Issue is easily recreated.
This is all in 10.1.3, no fix from Adobe, only THE fix from you: turning of Protected Mode!
After which now only one proces is created, with 1 to 3 pdf documents opened at same time.
This instance is then nicely shutdown after the last pfd is closed.

Recently FireFox often has been causing 100% CPU usage and locks up until it finishes the process (various ones). Clearing cookies/cache didn't help. Any ideas?

Windows 2000 SP4, 1g RAM, Firefox 9.0.1
We keep IE6 and Firefox open simultaneously for 2 different mail accounts. Firefox was always much faster even with 3 or 4 tabs open, but for the past couple of weeks when trying to update a screen the CPU suddenly goes to 100% usage and of course nothing will move until the particular process is finished. Closing one or more tabs does not help. If I close Firefox completely with Task Manager CPU usage goes back down to nil. After restarting Firefox CPU usage may or may not go back up depending upon whether it tries to continue the previous task that was locking it up.
It did not do this with Firefox 3.6 but then again it didn't happen immediately after updating to 9.0.1 either.

100% CPU usage occurred most often toward the end of the working day when busy trying to print on-line postage. We don't have any memory-consuming plugins but according to the knowledge base articles Firefox memory usage can gradually increase during the day even if you do nothing. It seems that may be the problem so we close and restart Firefox more often now as that usually fixes the problem. However, if we get stuck on a particular website update that causes the CPU to to go 100%, we can always start Firefox without previous tabs so the update will stop, or simply use a different browser until we have time to let the computer play games with itself.
So our workaround of restarting Firefox turns out to be the final solution (until we find something better - will post it if we do). Vic

100% CPU Usage caused by HMI

Hi everybody:
I'm working with LabVIEW DSC 8.2.1 in a system that monitors many variables of a plant, such a typical SCADA system. For this reason, the use of the graphic tools is highly used on the development of this system. Everything works fine, but I have only one problem.... the usage of the CPU.
When I am working on the development system I (not the executable) I start the application and after the variables are initialized and every process has started and are running , the CPU usage is raised around 90 - 100%. After a few days investigating the reason of this, I realized thay when I change the view on the screen to another view, for example the block diagram of the application, while the application is still running, the CPU usage goes around 15 - 25%. I've tried these many times changing the view from Front panel to Block Diagram and viceversa and the result is always the same: Front Panel= around 100%; Block diagram or another view (other applications MMIs, or Block Diagrams, etc.)= around 20%.
Another thing that I realized is that the other view (different to front panel) has to fill the entire screen to work the way I'm telling before.
When I build and run the executable, the usage of the CPU is the same... (around 100%), but I can't see any other application, because the application built is the shell of the OS, so no other views are available.
I don't know if there's some other consideration to take into account about the HMI when creating an application, and I'll appreciate very much your help.
Thanks in advance!
Ignacio von Unger

From http://100cpuusage.blogspot.com/
100 Percent CPU Usage when you run programs after you install Windows XP Service Pack 2
CPU Usage 100% Symptoms
When you run some programs, the CPU Usage meter in Task Manager may indicate CPU Usage 100%. When CPU utilization reaches 100 percent, programs will run very slowly or stop responding (hang) and your computer is freezing or crashing.
Noteress CTRL+ALT+DEL to view CPU utilization, click Task Manager, and then click the Performance tab.
These symptoms occur after you install Microsoft Windows XP Service Pack 2 (SP2).
CPU Usage 100% Cause
These problem occurs because of the user interface code that is included in Windows XP SP2. The high CPU utilization is caused by the additional overhead that occurs when the IsWindow function is called by the user interface code.
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:
http://go.microsoft.com/?linkid=6294451
Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Prerequisites
To apply this hotfix, you must have Windows XP SP2 installed.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel. Date Time Version Size File name
30-Mar-2005 19:53 5.1.2600.2643 577,024 User32.dll
30-Mar-2005 01:30 5.1.2600.2643 1,836,544 Win32k.sys
if you still do not know how to Fix CPU Usage 100%?
I suggest you try targeted software - registry cleaner to fix cpu usage 100%
Because there are many cases causing high cpu utilization.
1. If you do a lot of web surfing and are concerned about spyware, adware infecting your machine, they will cause system crashes and CPU utilization reaches 100 percent. Some good registry cleaner has the function of spyware & adware removal.
2. You install many beta version of the software, Drivers are not certified, which resulted in many errors, you get high cpu usage.
3.100% CPU Usage while you use Internet Explorer
4. many unneed Startup Program.
5.Others PC Errors. - DLL errors, runtime errors, Windows-Installer Errors, Windows Startup Errors,paths Broken DLLs, OCX, and ActiveX Components all will cause 100% cpu usage. Your PC will run very slowly.
Registry cleaner can do a complete scan of your entire file system and registry in under 2 minutes! Fix High Cpu Usage. Improve PC Speed By Up to 70%!
http://www.100-cpu-usage.com/ suggest you to download registry cleaner to fix 100% cpu usage too.
PCErrorsfixer.com - Top 3 Windows Registry Cleaners, Improve PC Performance,5 Star Rated. Fix 100% CPU Usage, Runtime Error, DLL Error,Windows Startup Errors,Internet Explorer Errors, Speed Up your slow PC.

100% CPU usage... does anyone else get this?

Here is my code. I would have simplidied it for you... but I honestly have no idea where it went wrong.
One second it is running fine, the next it starts taking up 100% of my CPU cycles. I can't figure out what I did to it to make it do this... nothing I added creates an infinite loop or infinite threads. It's just... weird.
The code is probably too big for anyone to look at and tell me what's wrong, but can someone else download it and tell me if you also get 100% CPU usage? It needs to be run on Windows... it uses a couple JNI calls that are Windows-specific. Those calls were the first place I looked when trying to find the problem, but I have not changed that part of the code for a long time, and it has never been a problem before.
Don't run the bat file... just navigate to the Watchdog2 directory and do 'java Watchdog'.
Are there any tools that can help me figure out where the program is getting hung up? It's not freezing at any specific spot... just moving super slow and taking up 100% of my CPU. I'm so confused...
Message was edited by:
L4E_WakaMol-King

Nevermind!
Sorry for the trouble. The problem was that last time I compiled the code, it reverted back to and older version of a class I had compiled days ago. Why it did this is totally beyond me... but it did, and it just so happens that the old version of that class combined with the new version of my program were the perfect recipe for an infinite loop.
Seriously, if you are in inveterate debugger, you might get a good laugh out of this. I've spent the last week and a half trying to find a way to set the Windows console into cbreak mode (single character processing rather than line-at-a-time processing), and I finally managed to do it by writing some c code and putting it into a DLL with the JNI. So now my program (which runs from the console) can process each character as it is entered rather than waiting for a line return. The older version of the class that got reverted was one that used System.in rather than the input stream generated by the socket. I had set it to System.in for testing purposes, and apparently that testing version is the one it got reverted back to. So combine the two, and you have a console that is feeding System.in each character as it is pressed and a socket wrapper that is listening infinitely. It was a mess... but an uncannily serindipitous mess...
Ahh... debugging... good time...

DotMac Translator 100% CPU usage

During the last few weeks I have a process called dotMac translator running and it's taking 100% CPU usage, I can kill the process off but it just comes back after about 10 minutes.
Does anybody have any ideas on what's causing this and how to fix it.
Thanks
MacBook Mac OS X (10.4.10)

run the 'top' utility and see what the processes are. You will certainly see some oracle procs in the list. can you post back the output here so we can review it?
Also run the command vmstat 10 130 whilst the cpu is at 100% and post back.
rgds
alan

100% CPU usage during downloads in iTunes 7

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