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Windows 7: CPU Usage abnormally high, sometimes peaks to 100% for no reason.

08 Apr 2012   #1

Windows 7 Home Premium 32bit
 
 
CPU Usage abnormally high, sometimes peaks to 100% for no reason.

So this morning everything was fine, my CPU usage was at its normal 20% or so, occasionally up to 40 if I was playing games or something.

After coming home this evening however, turning it on again was taking much longer than usual. It took about 15-20 minutes to get to the desktop, and another 5 to load the icons properly (probably because I have Skype set to run automatically on startup).

When it finally worked with enough speed for me to actually do anything I checked my task managers performance screen, and it was up around the 90% area, and then hit 100% and I experienced the same immense slowness with everything.

I do get periods where my laptop is usable, but even then my CPU usage varies wildly between 30% and 80%, with the only stability coming aroudn 50-60% mark.

I am currently running an anti virus scan (I use ESET NOD32 Antivirus 5) which is almost complete, but I doubt that it will help - has anyone got any clue how to fix this?

My laptop is a HP Probook, model number P4510sVP7570Q5X320NIBNCN32Wa. I run Windows 7 Home Premium 32bit on an Intel Core 2 Duo processor, roughly 2.26 GHz.

My System SpecsSystem Spec
.

08 Apr 2012   #2

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

What process is using the 90% CPU in Task Manager?
My System SpecsSystem Spec
08 Apr 2012   #3

Windows 7 Home Premium 32bit
 
 

None of them, the largest one is my web browser at 300,000-400,000K.

Thats why I said no reason lol - its not any program I'm running, the CPU usage just spikes massively without anything being done.
My System SpecsSystem Spec
.


08 Apr 2012   #4

Windows 7 Home Premium 32bit
 
 

Anti Virus scan complete, cleaned a few things here and there but hasn't solved the problem.
My System SpecsSystem Spec
08 Apr 2012   #5

Windows 7 Professional x64 Service Pack 1
 
 

Quote   Quote: Originally Posted by Hedgehog648 View Post
Anti Virus scan complete, cleaned a few things here and there but hasn't solved the problem.
Download and install malwarebytes:Malwarebytes Anti-Malware - Download.com
Once installed and updated, run a full scan and see if that helps. If it comes up with anything, remove it.
My System SpecsSystem Spec
08 Apr 2012   #6

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

Quote   Quote: Originally Posted by Hedgehog648 View Post
None of them, the largest one is my web browser at 300,000-400,000K.

Thats why I said no reason lol - its not any program I'm running, the CPU usage just spikes massively without anything being done.
That's your memory usage. What about the CPU?
My System SpecsSystem Spec
08 Apr 2012   #7

Windows 7 Home Premium 32bit
 
 

Right now it seems to have got better for a bit, but I don't hold out hope that it is a permanent recovery - I will check that next time it happens and post.
My System SpecsSystem Spec
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 CPU Usage abnormally high, sometimes peaks to 100% for no reason.





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