safeboot, my question was to Tristan.
"I'm guessing they're trying to say that you (or someone else who had access to your personnal PC) installed EEPC (unlikely but not impossible).
What you need to prove is that it's their version that has been installed and the only way to do that is to unlock it.
The only way to 'prove it' is if one of their corporate username/passwords unlocks the PC"
You may try login User Name=xxxxxxx(xxxxxxis your login name which you use for windows login), Password=12345(Default Password) then u'll get prompt for Password Change.
You can contact your McAfee Administrator.