LOL!
It looks like a virus deciding on how you described it.
Normally only system files/processes don't allow deleting themselves.
What's that phpdev5 stands for anyway? I don't think it's a system process, so there is a high chance it's a virus. Have you tried logging in SAFE MODE? When Windows loading continuously press F8
LOL! If you know how to use msconfig, then you know about F8.