This parasitic resident virus infects COM files being executed. The virus counts programs being executed on an infected system. When the counter exceeds 256 the virus makes the hard disk unbootable by placing an infinite loop to the MBR code.
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
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See the manual for your F-Secure product on the Help Center.
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