Just to clarify things, this only happens in Safe Mode, when you start the PC normally it's fine? Also, do not do a shutdown by holding the power button unless the system is totally locked up, doing a shutdown that way can damage the hard drive or file system.
Yes, only in safe mode. I can log in just fine when the computer is shut down and started up normally. And I only hold the power button to shut down when it is frozen and I cannot recover or shut down any other way. I know it is not a good thing to do