Trojan:Boot/TDSS.Gen!A is a generic detection that identifies infected Master Boot Records (MBRs), usually in association with a variant from the TDSS malware family.
Security programs use generic detections that look for broad patterns of code or behavior to identify similar programs or files. If you suspect the file was incorrectly detected, go to: Removal: Suspect a file is incorrectly detected (a False Positive)?.
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.
The MBR is the first physical sector of a computer system's hard drive and contains the first code loaded and executed from the drive during the boot process. A malicious program capable of subverting this critical sector is therefore able to control the entire system, while masking its own presence from the user.
For more information on TDSS malware, please see: