Immortal Riot is a virus writing group based in Sweden. They have written several simple and buggy viruses, which they actively spread. Some of these viruses were posted to Fidonet's INT.VIRUS conference as DEBUG scripts in the end of 1993.
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.
Variant:Immortal.282 (Extasy)
Other:Resident, COM-files
This virus contains text 'EXTASY! (c) Metal Militia / Immortal Riot'.
Variant:Immortal.392 (Ravage)
Other:Resident, COM/EXE-files
This virus contains text 'RAVAGE! (c) Metal Militia / Immortal Riot', and infects also EXE files.
There is a large number of other viruses authored by this group.