Win8 not shutting down "Windows Logon Application" causing 100% CPU

OS: Windows 8 64-bit

When I try to shut down, the process "Windows Logon Application" starts using one 100% of one CPU core, and the system does not shut down. When I try to end the task, it asks if I want to abandon unsaved data and shut down. This is happening every time I go into Windows now. I used the reset button last time, and again it wouldn't shut down. I had to hold in the power button for 10 seconds to turn it off, but I can't keep doing that.
4 answers Last reply
More about win8 shutting windows logon application causing 100 cpu
  1. Bump
  2. are you updated or did you updatee your computer recently?
    any new drivers installed before it started the trouble?

    log the computer in safe mode (shift +f8) and try shut down. did it work?
  3. No, I have not installed any updates. I can't really install any updates either until this issue is fixed, because updates require a restart, and I cannot restart right now.
    I have installed some drivers, I'll experiment a bit. The problem is I need those drivers.
    Can't boot into safe mode in Windows 8 unless I restart, and I can't restart.
  4. Switch it off manually and boot into safe mode and try restarting
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