Ok, I've uninstalled my Norton Security, and tried to run my Disk Defrag. I get the following message:
"Disk Defragmenter is scheduled to run on the volume: (C

.
Please run Chkdsk/f."
I went to run, and typed chkdsk/f in the blank and hit ok. It then said, not found.
Any help would be very much appreciated.
Thanks.