I installed avast yesterday…scanning thoroughly…it even detected 2 viruses(files which i deleted)was going smoothly for quite awhile until computer completely froze…had to shut to down completely…tried again to make full scann…same freeze up…computer is crashing pretty badly recently…ANY SUGGESTIONS? …PLEASE 
Next time, don’t start the same topic again, thanks.
What’s your OS ?
Is archive scanning ON ?
Please, turn reporting ON: Settings\Report file\Create report file & set [OK files] - and try to figure out what file makes avast to freeze. Thanks.