Teatimer terminated userinit.exe on a reboot:
12/9/2006 3:33:47 AM Encountered and terminated Win32.Agent.ig in C:\WINDOWS\system32\userinit.exe!

There's only one userinit.exe in System32(didn't let Teatimer delete the file.)
Properties show Company:Microsoft Corporation.Also,if you click on userinit.exe,Teatimer terminates it again.userinit.exe scanned clean at Virustotal.