Worm:W32/Palevo.gen!A is a generic detection for variants from the Worm:W32/AutoRun 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)?.
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.
Check for the latest database updates
Submit a sample
Exclude a file from further scanning
Note You need administrative rights to change the settings.
AutoRun worms spread by copying themselves into the root directories of hard drives and other writable media, such as USB memory sticks.
For more information, please see Worm:W32/Autorun.