iTunes 10.5 CPU Issue

After the recent iTunes update (10.5) I noticed the


was suddenly chewing up CPU – everything still seemed to be working, I could still sync devices, it was just grinding the PC towards an early grave.

A bit of Googling suggested it’s a common problem and previously a reinstall of iTunes was the suggested fix – unfortunately this didn’t work for me, nor it would seem for a lot of people at version 10.5.

What did work for me was doing a

netsh winsock reset

from a command prompt (as Administrator) followed by a reboot.

Apparently the Windows TCP/IP stack can get corrupted and this will reset the Winsock Catalog to its default state – i.e. one that works properly.

It certainly fixed my iTunes problem and as a bonus the PC now boots faster and general network performance seems to be improved – one to remember!


  1. oh wow! it works!!!! thx a lot – i didn’t know what else i could do and now everything is fine! i can synch + purchase again. thanks, thanks, thanks!!!

  2. Thanks the solution worked for me, however when I shutdown my computer and restart Apple Mobile Device starts chewing up the CPU again.
    I have to either stop the device manually or do the winsock reset again….any
    suggestions ?

  3. I just wanted to say thanks, worked (for the time being) on my PC. Its been bugging me for ages!
    May well spend some time looking though the rest of your stuff!

  4. My brother recommended I may like this blog. He was once entirely right. This submit actually made my day. You can not imagine just how much time I had spent for this info! Thanks!

  5. It worked! Thank you, thank you, thank you. Why apple won’t help you on this one for free I don’t know as it stops you from indulging in their holy grail … Spending money on itunes!

  6. Thanks for the solution, it works perfectly now! I was at a complete loss as no other suggestions worked.

  7. Wow. And it is so easy to fix 🙂 Apple should really compensate you. What a trash of Apple services resolving this problem!!!! Not even in the 10.5.2 update!?!?!!? And now with your solution we can go back and buy apple music and applications? They should really pay you

  8. Wow. I have an i7 975 @ 3.33 GHz with 6 GB of memory running on Vista 64. This applemobiledeviceservic took it down to 30% free and 100% memory sometimes. THANK YOU FOR THIS FIND!!!! I took before and after ss of task manager, now runing 99% free. Also did logs of the free HijackThis before and after but have not diagnosed yet.
    Apple has to be the programing TEFLON company of all time! If any other company put out a product that crashed systems they would be out of business. I also had the same backup issues with my ipad that many have. finally took off apps, redid, and put the same apps back on and it has been working fine. But I have now WASTED a good 40 hours of my life due to this and the ipad issue.
    Thank you, thank you, thank you to you
    Shame, shame shame to Apple programmers.
    John in MN

  9. Thank you (again), APSDaemon.exe started chewing up CPU again and I had forgotten about this fix.

    Process Explorer was showing this task connecting to and utilising no disk, little network bandwidth, but nearly 100% CPU!

    After re-finding your solution all is well again (I think the issue re-appeared because I just upgraded iTunes)

    Thank You

  10. WOW, this work very very well! iTunes has never worked as fast as it does now after resetting the winsock!
    Windows 7 – 64 bit OS
    Thanx a lot!

  11. Thanks it works! My problems started when I installed CyberPatrol – content filtering. It seems Cyberpatrol is doing something to the winsock catalog. Only thing Cyberpatrol does not filter anymore. I can reproduce the error by re-installing Cyberpatrol.

  12. I have looked at these posts with hope but ran this and it didn’t seem to work. I have a windows 7 64. I must have done something wrong but have followed the simple steps but it hasn’t resolved. Anything obvious I could have missed!

  13. Thank you so much. It worked for me!

    Windows 7 64-bit OS
    Intel i5-2520M CPU
    4GB RAM

    It was taking up to 70% of my CPU’s capacity. Never seen it run that hot.

    Thanks again.

  14. I noticed this issue when my laptop was getting hot to touch and the fan struggled to cool it. What worked for me was un-installing all Apple software. Normal service was resumed!

  15. Hey, I am a bit hesitant to try anything in command prompt, for I’ve had bad experiences in the past. What does “netsh winsock reset” actually do? I’d like to know which parts of the computer it affects and what it resets. Furthermore, I’ve got a vista and itunes 10.6 and am wondering whether it should still work for these. A reply would be muchly appreciated.
    Thanks heaps.

  16. hi bandabat – basically itunes is clashing with something that’s monitoring your network stack, it could be legitimate software (eg anti virus) or might be something more unpleasant. the reset will remove the hooks from the network stack, which means itunes should work – although it may impact on what ever had its hooks removed.

    can read more about it here and here

    the commands for a reset on Vista are slightly different to those on XP so proceed with caution – and find out what’s hooked in first, you may need to check its still working and/or reinstall it afterwards.

  17. As per the above, in Vista, it’s worth first just running a basic ‘diagnose and repair’ in the ‘Network and Sharing Center’.

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