CHKDSK at boot time on windows 7 without a reason
Solution 1:
It seems it is a bug on the NTFS when two processes access the same file. More details at http://social.technet.microsoft.com/Forums/fi-FI/w7itprogeneral/thread/df935a52-a0a9-4f67-ac82-bc39e0585148
The error gets registered on the windows event registry under System/Ntfs.