Summary
AntiCMOS is a typical boot sector virus infecting master boot sectors on hard disks and boot sectors on diskettes.
The virus infects a hard disk only if the user tries to boot from an infected diskette. If the hard disk is infected the virus infects practically all diskettes that are used in the computer.
AntiCMOS.A has an activation routine that tries to modify the setup information in the CMOS memory. AntiCMOS.B tries to play a tune. Due a bug in the code, neither of these routines will probably ever get to be executed.
AntiCMOS virus was first found from Hong Kong in January 1994. It's now common all over the world.
The AntiCMOS.B variant contains a text string 'I am Li Xibin'.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
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