This virus was found in the spring of 1994. It has been reported to be in the wild in the Czech Republic, Hungary and Poland. J&M; virus infects diskette boot sectors and hard disk MBRs in the usual manner.
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 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.
J&M; is a destructive virus, activating on the 15th of November. Upon activation, it enters an infinite loop and formats the first tracks of the first hard drive. There has also been a large-scale outbreak of J&M; in Iceland during 1994. This is quite remarkable in itself, since before this incident no new viruses had been detected in Iceland for over two years. The virus was probably brought into Iceland in a portable PC which had been infected while its owner was traveling in Eastern Europe.
In autumn 1994 J&M; was on the move in Germany, in early 1996 it was reported to be in the wild in the USA as well and in May 1996 it was located also in Japan.