Hi Anvil,
That error appears to be a Vista (Aero) related one - I take it that you are running Vista? If so, turn off Aero just for the duration of the scan, then re-enable it.
Please see this Topic:
Ad-aware 2007 Error After Scan, ErrorAs you will see from my posts in there, AAW 2007 is not yet officially Vista-compliant.
Regards,
Spike