This means avast wont use your hard drive more than it needs thus making your computer usage alot faster compared to situation when antivirus needs to scan your hard drive when you use it (unless you have good ssd).I have installed avast to more than 6 computers and only one had troubles, but those were hardware related problems (adaptec raid card didnt work well with motherboard).I give 4 because they didn´t give me any real support, even if your software is freeware you should at least be intrested what is wrong with it. When i first started to use avast, norton or f-secure didnt have this feature. So f-secure was just taking my computers juice for nothing.One of my favorite features is avast screensaver which scans your hd:s when computer is on screensaver. Also avast found few trojans that f-secure didn´t found. F-secure was just terrible (deleted outlooks inbox when it had one virus).
Interface can be changed btw.In short Avast! is one of the best antivirus i have used. This review is for 4.8 stable versionEvery antivirus has it´s cons and pro´s, but when you get antivirus for free you can´t really complain things like user interface if it can do what you want.
