After trying to run McAfee VirusScan yesterday, my computer froze up completely, after that application had reached "27% complete". It was so completely frozen that I could not open any other application, including Task Manager, and I could not even do a shutdown. There was no alternative, but but to an improper shutdown by shutting the power off. Since then, every time I start my computer, I get a message that says,

Checking file system on D:

The type of file system is NTFS.

The volume is dirty.

IIt then does a time consuming run of CHKDSK on drive D:, and then shows the results, which are completely normal and error free. (Note: I have two hard drives, C: and D:.) If I run CHKDSK from drive D: using the command line, again, I get completely normal results. If I try CHKDSK/F it complains that "another process is using drive D"" even though I have no applications running.

What exactly is the problem, and how can I fix it?

You could disable autocheck but that would not be a proper solution.

I'd try to boot from a winpe/bartpe/XP install CD/DVD.... and do a proper chkdsk /r of both partitions.

How about shutdown McAfee VirusScan first , then try CHKDSK/F again.

Ref