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Virus.DOS.AO.784 or AO is a virus that runs on MS-DOS.

Behavior

AO is a dangerous memory resident parasitic virus. It hooks INT 8, 10h, 21h and writes itself to the end of COM files that are accessed. Depending on its counters it corrupts the CMOS or reboots the computer. The header of infected files contains the ID-text:

ÄO0

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