Details Ai22.1659 It is a harmless memory resident parasitic virus. It installs itself memory resident and replicates only under DOS 5.x and 6.x. It hooks INT 21h and writes itself to the end of .COM and .EXE files that are executed. While installing the virus also infects the C:\COMMAND.COM file. The virus does not manifest itself in any way, it contains the ID-text: Ai22

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