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I am having this issue of lag in Windows 7 Professional, the CPU usage is 100%, even if I am only watching video on GOM player, nothing else is open, but the usage is 100%, or if I open Firefox/Chrome the usage becomes 100%, I need to restart the system to get rid of this. It occurs many times a day.I thought that windows might have the issues, I installed it twice but the same issue occurs. My friend told me that it might be low voltage issue, but even on battery power, I am having the 100% usage issue.

(System Specs : core i5, 4GB ram, 500GB HDD, intel HD card)

I am uploading image of my task manager:

enter image description here

Thanks

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Add your system specifications to your question. How did you reinstall Windows? (using the actual Microsoft disk or your laptop's recovery tools) – Breakthrough Jul 4 '11 at 18:52
2  
@kaibuki: Which process is hogging the CPU, exactly? – Mehrdad Jul 4 '11 at 18:53
    
@breahthrough : Yes using the CD, I formatted the C partition, and installed the windows , fresh copy on the partition – kaibuki Jul 4 '11 at 18:54
    
@Mehrdad : that is the the issues, system Idle Process it is taking the max CPU usage...all other apps which I run the hardly take more than 20% of usage. – kaibuki Jul 4 '11 at 18:56
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@kaibuki: from you comment it seems you have AVG and Avast installed at the same time? If that's the case it is no wonder your computer is slow. – James Aug 4 '11 at 8:37
up vote 7 down vote accepted

System Idle Process doesn't take up CPU. It's a dummy process telling you how much of the CPU is idle, hence the name.

There's no problem with your computer.

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I know its a dummy process, but again why my system getting slow and lag more than usual , I have traced one process avgchsva.exe, I found it taking 40+% of CPU usage, but now its calm. – kaibuki Jul 5 '11 at 3:06
    
@kaibuki: Surprise! Notice that avgchsva starts with AVG. i.e. your antivirus is functioning normally. :) – Mehrdad Jul 5 '11 at 3:13

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