Solve : Window 8.1 stuck at on-log screen?

1.	Solve : Window 8.1 stuck at on-log screen?
Answer» Alright I can not get into my PC. I had an update last night and TODAY I load up my pc and my mouse and KEYBOARD is not woking. This I did to try and fix this. 1.) Windows 8 repair "Windows could not repair" 2.) USB PORTS FIX (don't have USB configuration and changed it to Intel XHCI mode <3.) System restore did not work 4.) System reset did not work say (invalid media disk) 5.) System files rest did not work (invalid media disk) I don't know what to do I looked every where i mean every where looked over 500 pages about this most was junk and nothing to help About 80% of the people said to use the USB fix did not work. Can any one plz. help me I'm about get ride of this pc and give up on all pc for this Do you have any disks or USB devices pluged in?

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