Stop! anti-virus is intended for detection computer viruses in memory and on disks of the computer. The program finds out and deletes most dangerous: Trojan program, remote administration program (Backdoor), Password MalWare program (Trojan. PSW), Internet Worms (I-Worm), IRC and mIRC worm (IRC-Worm, mIRC-worm), VBS viruses, Win32 viruses, macro - virus, BAT/CMD viruses. In the program the algorithms of the heuristic analysis are realized, and algorithms of search of new viruses allowing to find out both set primitive old DOS of viruses, and viruses of a new generation oriented on 32bit platform.