McAfee not functioning properly, errors on CHKDSK

Hello there,

I have an INSPIRON E1505 with Windows XP.  The McAfee protection was not working properly, so I contacted customer service.  They checked my computer and said that I should contact the computer manufacturer because I have errors on CHKDSK.  I've done some research on this website, but have not been able to find a solution yet.  

I ran the full Dell PC diagnostics, and everything passed except my battery.

I used this page

http://support.microsoft.com/kb/315265#method2

to guide me through chkdsk, running it from "my computer" and choosing "scan for and attempt recovery of bad sectors."  Phase 2 appeared to be nearly down when I received the prompt, "Windows was unable to complete the disk check."

I'm not sure if this matters, but the computer was not used for 2 years from 2009-2011, as I was out of the country.  After I got it running again and ran updates, it seemed to be working just fine until I recently discovered this issue with McAfee.

Everything else seems to be working just fine.

Thanks for any support you can provide!