I have a end user that has a Samsung Slate 7 series tablet with Windows 7 OS and he is having an issue logging onto his computer from the Windows logon screen. When he clicks his username the screen goes black than goes back to the logon screen. It doesn't get him to enter his password. He tried the click on the Administrator account and the same thing happens. It seems like a really strange problem and I am not sure what troubleshooting could possibly fix this problem. I had him go to safe mode but again when he clicks on his username the screen goes black and then comes back to logon screen so he is never able to enter his password. Has anyone else had this problem before and if so what do you do to fix the problem? Thanks in advance for your help.