Panda antivirus mistakenly flags itself as malware, bricks PCs #vmvwiki

An update to a number of Panda antivirus programs Wednesday mistakenly flagged core files as malware, putting them in quarantine. In doing so, the antivirus system ceased working.

http://www.zdnet.com/article/panda-antivirus-mistakenly-flags-itself-as-malware-breaks-pcs/