alg2.exe is a worm W32.Rbot-BDT. alg2.exe opens a back door on IRC channels. alg2.exe spreads via open network shares. Related files: %System%\alg2.exe %CurrentFolder%\aspr_keys.ini More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill alg2.exe process and remove alg2.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.