Across all ThreatExpert reports, the file "persi0.exe" has always been identified as a threat.
The file "persi0.exe" is known to be created under the following filename:
Note: %ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
The following threats are known to be associated with the file "persi0.exe":
Trojan.Win32.Midgare.sg [Kaspersky Lab]
Do you have Deep Freeze installed on your computer?
To be 100 % sure, upload the file persi0.exe here:
Is $Persi0 file on c:\ a virus ?
I do not think it was there the day I installed XP.