Windows 7 won't boot past starting windows screen / stuck on Classpnp.sys in safe mode [duplicate]

Windows 7 won't boot past starting windows screen / stuck on Classpnp.sys in safe mode [duplicate]

I'm having trouble with my Windows 7 machine It was fine, until this morning, when, for no reason what so ever, it decided not to boot past the "Starting Windows" screen No hardware has been installed / removed.