Only 65% Full Computer Scan

My Whole Computer Scan freezes up after a 65% run on the Progress Bar.  I've tried it twice in the past few hours.  Today, after the automatic AVG Tune Up should have been completed, there was a pop-up notice that read to the effect of:  "Incomplete.  There have been changes in the computer settings."   How do I get this corrected?

Thanks in advance,



Barbara