For months now I've noticed that when I leave my Windows 7
machine alone for over 30 minutes the hard disk starts
grinding away relentlessly. Of course if you go to
investigate what it's doing all activity ceases immediately.
Preventing you from finding out exactly what is going on.
I had these thoughts of possible malware or a virus
infection cross my mind and so downloaded and ran Process Monitor and then
left the machine sit for 50 minutes. When I came back to it
sure enough the hard disk was grinding away. But now I've
been logging the activity! So what's the secret process
using so much disk I/O?
9:49:49.6359004 PM MsMpEng.exe 948 ReadFile
9:49:49.6465209 PM MsMpEng.exe 948 ReadFile
9:49:49.6465457 PM MsMpEng.exe 948 ReadFile
9:49:49.6540933 PM MsMpEng.exe 948 ReadFile
9:49:49.6541138 PM MsMpEng.exe 948 ReadFile
9:49:49.6577645 PM MsMpEng.exe 948 ReadFile
9:49:49.6600897 PM MsMpEng.exe 948 ReadFile
Oh just Microsoft's anti-malware service checking all my
files. "Alright... everything seems to be in order here...
as you were".
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