Firstly, upload the file to http://virustotal.com to see if it is a genuine
detection or a false positive.

IF it looks like a real threat, and is a Win32 file infector, then you would
be well-advised to save your data and do a FULL format and reinstall.

AVG has detected the Win32/Heur and Generic7.AYZT infections. I have the PC
running again without functional networking and have done a couple of full
system scans , one clean and the second showing Win32/Heur in fsutil.exe and
in system volume info restore.