virusremoval.vbs

i hv avast av...yestrday i scannd my pc.. it found a virus in c:\windows\sys..\virusremoval.vbs it could nt repair the same...so i deleted it... now wenevr i start my comp..an error comes "could nt find the script c:.,,,,\virusremoval.vbs" i dnt want to hv this startup msg...and also wanna knw...