I have this strange bug which I am not sure what is that triggers the bug, except it only occurs when I play WOW. But once the bug happens a few of the keys on my keyboard stop working. The critical one for me is the "c" key. Which happens to be a key in my password but not in my log in.

Result it looks like I can't login because one of the characters is missing from my password. I have to reboot to correct the issue.

Open up notepad and type your password and make sure all the characters are what you expect.