system
15
Scanning the file at Virus Total could answer this question.
Kerien, if you find your way back to this thread please upload F:\WINNT\system32\Userinit.exe for analysis
http://www.virustotal.com/en/indexf.html
Use the Browse button at the top of the web page to navigate to the file and click Send.
Also, what version of VNC are you running?