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Why is ATH.exe using 50% of my CPU?

This started recently, I think there was some quicktime upgrade that happened. I've rebooted my computer and the problem persists. I've found similar discussions referring to AppleMobileDeviceService, but I don't know if this is that issue or something else.

Running Windows 7 64 bit.


Only antivirus is MS security essentials and TrustedID SecureScan (made by Immunet?). TIA


Process explorer shows PID 7988

Windows 7

Posted on Sep 17, 2012 8:46 AM

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284 replies

Mar 30, 2013 2:22 PM in response to cdf5736

On Windows that would be quite interesting. I have written some process monitors in .Net before so I might give that a try. It would need to be run as an administrator though, otherwise it wouldn't be able to automatically kill the task... not 100% sure yet how I would detect if the process had gone rogue, but I might dig out Visual Studio and see if I can find a way to do that...

Mar 30, 2013 3:21 PM in response to cdf5736

I did it the simplistic way by creating a bat file that stopped and then started the ath.exe file, created an exe from that, made a shortcut to itso windows 7 could run it as admin, added it to task scheduler and set it to run every hour. I was too lazy to figure out a method to detect whether it had gone rogue and figured it was just simpler to keep on stopping and restarting it.

Apr 11, 2013 5:12 AM in response to DJRobX

They can't reproduce it? Seriously? They can't have tried real hard. Thinking maybe it was something on my desktop pc that had a conflict and caused this issue, I decided just the other day to try it on 2 different computers. One with a clean install of windows 7-64 and one with old xp running on it. Both computers ended up having ath.exe consume over 50% of my CPU if iTunes was left running with wifi sync enabled.


Try again Apple. It's really not that hard to make it happen.

Why is ATH.exe using 50% of my CPU?

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