Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: System process eating up the CPU

30 Mar 2012   #1

Windows 7 Ultimate x64
System process eating up the CPU

My home computer is a 3yo machine running Windows 7 Ultimate x64. A couple days ago, the SYSTEM process started running at 100%.

After playing all the usual games (disabling services, updating drivers & antivirus, rolling back, safe-mode, etc etc), I finally said "screw this", reformatted and reinstalled.

But the problem persisted. Let me be clear: a week ago, the system was fine. Now, even after a clean install, with no updates or new drivers or anything, the problem is there.

So I tried Windows Server 2008 R2 x64, Windows 8 x64, Windows Vista Ultimate x64... even Knoppix linux. No other OS has any issues.

But under Windows 7, even on a completely clean and fresh install, the SYSTEM process is gobbling up 100% cpu time.

And it's just about to drive me insane.

At this point, I figure it has to be some driver interacting with hardware in an odd way. But which one?

Does anyone know how to drill down inside the SYSTEM process and see what's going on? (Without installing Visual Studio and bunch of debug files and all that.)


My System SpecsSystem Spec
30 Mar 2012   #2
Microsoft MVP

Windows 7 Ultimate 32bit SP1

Try Process Explorer ... Process Explorer
My System SpecsSystem Spec
30 Mar 2012   #3

Windows 7 Ultimate x64

I tried Process Explorer, but unfortunately it doesn't let you drill down inside SYSTEM. It gives you the Interrupts thread and one other thing.. and that's it.
My System SpecsSystem Spec

31 Mar 2012   #4

Windows 7 Ultimate x64

I figured it out. Ended up having to install the Windows SDK and use xperf and Windows Performance Analyser to track down the offending driver....

... Apparently Windows 7 no longer likes my USB 2.0 controller. Disabling the "enhanced" controller idled my CPU back down to 0%.

Which is no big deal since I don't often use USB drives. It is certainly odd, though.
My System SpecsSystem Spec

 System process eating up the CPU

Thread Tools

Similar help and support threads
Thread Forum
How to determine process eating up CPU resources?
Is there any way in Windows 7 to see what any particular processor core might be struggling with? Every time I Sleep my computer and wake it back up, Core 5 comes back at almost 100% utilization and I can't figure out what it's doing or why. It'll even be listed as 'Parked' and STILL be...
Performance & Maintenance
sppsvc.exe is eating lot of process
Hello can anyone tell me what is sppsvc.exe? as it eats a lot of memory mostly it eats 5-6 M.B's & it starts after 30 mins after turning my computer if i disable it by going to Services.msc my desktop goes black & says Windows is not Genuine:confused: If i enable it once again then it eats a...
Performance & Maintenance
nvscpaisvr.exe process eating ram
hi, sorry if this is not the right place to post. task manager lists this process, nvscpaisvr.exe, 'stereo vision control panel api server', (c) nvidia corp. currently it's got hold of about 300 000 k of ram and i havent seen it before. after restart it starts at about 30.000 but rapidly grows...
Graphic Cards
Support dock process is eating up my resources, please help!
Something is taking up all my system resources causing my computer crash a lot, Iíve noticed a process called iYogiURLHit.exe isconsuming my 16-20 MB of RAM even after un-installing the support dock program from my computer, any idea about this program? Is this suspicious? File location C:...
Performance & Maintenance
java.exe process eating bandwidth
Hi, Of late, the java.exe process has been eating a lot of bandwidth even when i'm doing nothing. Its been doing this for quite a few days now, so it cant just be routine updates. Snapshot's been attached. What the hell is this? how do i get rid of it? Unable to end process, it gets started as...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 09:02.
Twitter Facebook Google+