The disk drive error is a constant warning on my PC at the moment - and I believe that it's software related - either Windows upgrades or AdAware 11.
I have regularly run CHKDSK and it finds no problems - to get rid of the annoying Action Center message - go into Action Center and turn off the drive status message!
To avoid the CHKDSK seeming to stall on 17% I suggest that you run it with the following command chkdsk /spotfix. CHKDSK is always running in the background and the spotfix command will only address any problems found by the background runs. It also has the advantage of showing a progress %age as it runs following a reboot.