2. taken care by avast on access (file system shield)
3. the term anti-malware is also understood as antivirus. malware is all the bad stuff collectively (virus, worm, rootkit, spyware, keylogger, dialer, adware, etc)
4. you can pause/stop a scan when battery is low. schedule scans can be configured to not occur when on battery mode (something like that)
6. if Windows is not booting, press F8 to access recovery (at least in Windows 7 you do, for laptops from OEM like HP and Dell you can access recovery manager).
TOP 10 REVIEWS IS A BIG NO NO. MONEY INFLUNCES THE RATING. Get accurate testing results from AV-Test and AV-Comparatives.