PC running incredibly slow and explorer.exe always using 100% CPU
Since 2 days, my PC has been ruinning incredibly slow, I mean like nearly 1 minute to maximize a window, 30 sec+ to open the start menu. I rebooted and it worked fine for another few hours and started again.
I noticed explorer.exe is always using 98-100% cpu in task manager.
Could this be a virus? My updated AVG AV doesn't find anything, but none of the AVs I've had have ever found any viruses even when I had some, so I don't trust any AV at all since they only detect known viruses.
Ran them all so far except spybot and panda and nothing found as I suspected.
I don't think it's a virus or spyware, it seems to be triggered by something, perhaps when I read a CD but I haven't done enough testing to be sure. It's always explorer.exe that suddenly starts using 100% cpu time for no apparent reason.
The type of the file system is NTFS.
Cannot lock current drive.
Chkdsk cannot run because the volume is in use by another
process. Would you like to schedule this volume to be
checked the next time the system restarts? (Y/N)
You need to push "Y".
Running CHKDSK /R is a good 1st step (start from the lowest layer and work your way up).
CHKDSK /R will check both the disk surface and your data. If it finds anything wrong, it will do its best to recover data and mark bad spots off so Windows won't use it anymore.