from my 'experiece' a2 has a habit of producing 'false possitives'
I was told on one of my scans I had a trojan etc ; since more updates THAT 'warning' has gone !!!!
I 'know' my computer ; I ran FULL system scans will ALL my updated programs and came up clean
I do not know your computer but try this ;when you run your a2 scan and click on any OF the scan results go to what the google search says
HOWEVER you do NOT want to 'overlook' a real infection so rescan DEEPLY and see what those results are?
PS; DO take a system restore point NOW.......................... just in case