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Windows 7: Issues with CPU hit 100%

24 Jan 2010   #1

windows 7 Pro x64
Issues with CPU hit 100%

This problem has been bugging me for a while. My windows 7 machine has been optimised to use all eight cores and every now and then one or more of those core will peek to 100% stalling what ever is using that core at the time. it only lasts for about 1-3 seconds but it gets very annoying that it keeps happening.

nothing is safe from this, anything that is using the core at the time will lock up for a short time, from the media and being that the music i'm running even to mouse pointer leave others systems going no problem. it really pisses me off when i'm about to get that allusive ******* in some game to have the game freeze for 3 seconds only to find i'm the on being shot at.

any ways, hopefully someone know this problem and can help.

if you need to know here are my core machine stats
I7 920
Asus P6t
6Gb triple channel DDR3 1600
Asus 9800 GTX+
Zalman 850W
windows 7 pro x64

also, my brother is running window 7 home premium with a quad core, it is also optimised for all cores and every now and then he will have the same problem although not as much as i do, but then again he doesn't use his machine as much as i do

My System SpecsSystem Spec
24 Jan 2010   #2

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install

Go to search type memory diagnostics, make sure the memory is ok.

Go to search download the free process explorer, see what is using memory.

Run and Anti Virus Scan.

Try using computer without the A/V

Make sure drives are up to date

Go to device manager look for yellow problem warning markers.

When it happens go to event viewer look for errors.

Dowload and run malwarebytes and see what happens.
My System SpecsSystem Spec
24 Jan 2010   #3

windows 7 Pro x64


I have avast, malwarebytes and spybot on this machine. it is squeaky clean

The next time it does a freeze i'll note the time and check the event viewer

Device manager reports no issues with any of the hardware devices

gonna start checking the other stuff now.

When all the tasks have been ticked off i'll come back here with my findings
My System SpecsSystem Spec

24 Jan 2010   #4

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install

When you have additional information or questions, you can report back and you will be provided with the excellent assistance that Seven Forum is known for.
My System SpecsSystem Spec
24 Jan 2010   #5

Windows 7 32 bit build 7600

What kind of optimization have you done?

From what I've read, dedicating cores to specific tasks is useless because of the default way Windows assigns processes. There is little to no performance gain.
My System SpecsSystem Spec
24 Jan 2010   #6

windows 7 Pro x64

went to the boot section, told it to use all eight cores
My System SpecsSystem Spec
24 Jan 2010   #7

Vista Ult64, Win7600

Hi, you might want to read this about window myths.

Issues with CPU hit 100%-myth.png

My System SpecsSystem Spec
24 Jan 2010   #8
Capt.Jack Sparrow

Windows 7 Ultimate - 64-bit | Windows 8 Pro - 64-bit

Well as Richard told it might be the drivers that is causing the issue. You could also try to reboot the System in Selective Startup

Hope this helps,
My System SpecsSystem Spec
24 Jan 2010   #9

windows 7 Pro x64

that would be easier if i could replicate the error all the time, i'm afraid the issues (although they do come round often) are random.

no, I've done the selective thing several times with clients machines and the one thing that is a must with that is a static problem.

This is why this problem is so elusive. any ways, i think i found something of significance but i need to observe a bit longer to see if this 'thing' pops up every time one of the cores go max or if it only has to do when explorer does a quick freeze on me
My System SpecsSystem Spec
24 Jan 2010   #10

Windows 7 Ult, Windows 8.1 Pro,

I suspect this is an A/V problem like richc mentioned earlier. I would try to disable or better yet, uninstall them one at a time to find out which one is causing the problem. It's the only thing that can cause this type of problem and A/V's are famous for it. The fact that it's happening on both machines which no doubt have the same A/V's installed makes it pretty clear what the problem is.
My System SpecsSystem Spec

 Issues with CPU hit 100%

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