CIS AV Hangs on scan of nv4_mini.sys (3.8.6595.477 X32)

When running a scan of my system CIS AV hangs scanning file C:\windows\system32\drivers\nv4_mini.sys. The magnifying glass keeps spinning but no files are scanned. Clicking stop will not cancel the scan. AV seems to be hung.

I am running Win XP Pro SP3.


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Make sure (if you are using Vista) DEP is set to Windows files only, disabled for CIS, or disabled completely.
Make sure no other AV (or disk scanner) is active.