If your desktop computer hangs or freezes for a long while and your browser keeps opening different windows on its own, then there’s a high chance that your system is affected by a virus. Get your PC checked and install an antivirus software such as this McAfee Antivirus on your PC. 1 Year Subscription Validity This software has a one-year paper license and is valid for 365 days. It optimizes your PC and protects it against viruses released by different hackers online. It also protects your system while you are browsing online and thwarts off spyware, malware, and any network intrusion. Additional Features It features Parental control, Home Network Security, File Shredder, Two-way Firewall, Net Guard Technology and Scanning Engine Checks for better performance. Compatibility This antivirus is compatible with Windows XP, Vista, 7, 8 and 8.1. But make sure you have enough space on your hard drive before running the software.