Today a laptop was dropped off with me that appears to be acting a little weird.
Symptoms: WinLogon.exe is using 100% of the processor, machine is running very slow and keeps locking up.
My first guess to this was this machine must have a virus or spyware. I pulled the hard drive out, plug it into another machine that is running correctly,and ran a virus scanner and spyware cleaners. A couple of minor bugs were found, but nothing real serious. (Virus scan was ran with Avast, and spyware was ran with SuperAntiSpyware, Adaware, and S&D).
Plugged the drive back into this laptop, booted it up, same problem. WinLogon.exe is using 100% of the processor.
Loaded into Safe mode: Same problem
Used system restore: Same problem
Created a new user account: Same Problem
Ran MSCONFIG, shut off everything (diag mode): Same Problem
I would prefer to try and correct the problem with out having to re-load windows. I am working on getting a friend of mine to send me a copy of his WinLogon.exe from his system (he is running the same ver. of windows w/ sp3), Not sure if I will be able to over-write the current file or not, and not really sure that if I do succeed in over-writting the file, if windows will boot back up correctly.
Short of doing a re-install of windows, would anyone have any other suggestions. If so, please be through in the steps to complete your recommended process.