Recorded using a virtual machine, as my roommate was watching TV way too loud to record with a camera. Anyway, the Mirror virus activates by becoming memory resident on first execution, and then waiting. When the next program is executed, the virus flips the screen horizontally and vertically and plays an annoying buzzing through the PC speaker. When the system is restarted, the virus fdisk's the partition, meaning it must be formatted before it can be used by any operating system.
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Virus.DOS.Mirror or Mirror is a virus that runs on MS-DOS. This is a dangerous memory resident...