Try doing disk check up in Safe Mode.
windows was unable to complete the disk check from My Computer...
What cause this and how can I fix it? Apparently, this is the reason I am unable to perform a defrag.
I ran a Chkdsk.exe and got the following msg: 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
I tried the above and nothing happens. What now?