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Explorer.exe 20% cpu usage when idle
Hey guys,
My sister recently noticed a drop in performance from her laptop.
She asked me for help and I tried to fix it but it seems I lack knowledge about the problem.
So here I am asking for help from anyone who might know how to fix this.
When on her laptop I did the following things:
I closed all programs in the taskbar and went to the processes tab.
There I found out about explorer.exe using 20 percent of the cpu.
I searched the internet for a fix for the problem.
I have scanned her computer with Microsoft Security Essentials and also tried CMD sfc scannow.
I ended up using Process Explorer. With that program I managed to kill the explorer.exe thread that uses the 20 percent of the cpu. So while that fixed the problem, every time she restarts the laptop the problem comes back.
So I hope someone can tell me how to permanently fix this without completely reinstalling Windows.
Thanks.