You are playing PcDefense
PC.DEfence is a strategy game with an exciting pixel art graphics combining classical tower defense gameplay with inconvenient story line. Evil viruses are coming out from usb stick to destroy your hardware. Protect the central processor using your savvy and upgradeable antivirus software at your disposal. Six different antiviruses with 4 upgrades each and special boosters are available to help you to achieve your goal. But take care! It’s only a 64 bits processing unit and every virus destroys one bit if it slips through!