Ad-Aware Free Antivirus+

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Antivirus and antispyware
Scans your downloads regardless of the file format before they have a chance to damage your PC
Blocks or suspends malicious processes and infected files before they try to start or connect to your system
Protects you while you browse the web by validating a constantly updated list of known bad URLs and websites
“Gaming mode” allows you to play games and watch movies without being disturbed
More features available in the paid versions of Ad-Aware