Scan report won't close, CANNOT QUIT ANTIVIRUS

Hi i did first scan after download-updates and restart

two trojans showed in report

deleted both

buttons at bottom of report page stayed grey COULD NOT CLICK 'DONE' BUTTON

tried to QUIT ANTIVIRUS but it would not close with pages open

NOTHING would close antivirus

 

had to OPEN ACTIVITY MONITOR AND FORCE CLOSE

 

this cannot be right. any solutions please?

 

(macbook pro i5 OSX 10.6.4.  snow leopard safari5)

 

thanx in advance