A critical software bug has been discovered in several of the most widely used anti-virus programs. It could be exploited to take control of a computer or to steal information, according to an analysis produced by the independent security analyst who made the discovery. The glitch affects 39 different Symantec products - including both home and enterprise versions of its anti-virus software. It resides within the Symantec anti-virus library, which is used by all of the packages. The analyst, Alex Wheeler, discovered that a critical error occurs when the Symantec anti-virus library decompresses files from "RAR" format for analysis Symantec...