Try running CHKDSK. John
I use Executive Diskeeper to defrag my partioned 200gig Seagate hardrive. Diskeeper will not run on 2 of my 4 partions, because it says that CHKDSK is scheduled to run on next reboot, either because of user request or because the os has found an error in the file system.
I have not scheduled CHKDSK to run.
I have rebooted 15 times, and each time windows XP runs CHKDSK, finds no errors, but still Diskeeper will not run on those 2 partions.
This "error" began after I restored XP, because of a failure to boot due to system file corruption.
AMD Athlon 64, 2000 MHz, MSI K8 Neo-V, VIA K8M800, AMD Hammer, 1024MB DDR, Seagate 200GB SCSI