I have an HP laptop running XP Professional SP-3. It has recently started running really slow on IEv8. While trying to remove unecessary apps and defrag it I got the message that "Disk Defragmenter has determined that chkdsk is scheduled to run on the volume hdd1 C:. Please run chkdsk /f." So I have done that from the command promp, hit Y and rebooted and chkdsk never ran. I then tried it from the GUI interface under properties for C: and got "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)." Of course I hit Y and rebooted and chkdsk still wouldnt run. So then I tried to run it in safe mode and got the same response. I have looked at all the forums and have tried many many things but nothing seems to work. If somebody has a solution that works I would be most appreciative. I am at wits end.