I have a crazy problem with my keyboard on Windows 7, that just appeared in the last few months. When I press the letters o, u, and h at the same time, a backslash \ ends up being inserted before the h. Actually if I tap all three simultaneously I just get uo\ or ou. This problem does not occur with any other combination of letters that I have found. "So what?" You might think. Well, actually, in normal, fast typing it end up being a regular nuisance for words like hou\se, thou\gh, hou\r, tou\ch... woah, I actually just found another combo glitch. Apparently u+g+h inserts a y: ugyh. Weird!
I'm really curious what could be causing this. I am using the US English keyboard setup in Windows, althou\gh (aaagh!) I also have the International Phonetic Alphabet keyboard installed. Just tested and the problem happens whichever keyboard I have selected. I don't have another physical keyboard to test with. I am using the Microsoft Comfort Curve Keyboard 2000 v1.0. I have Autohotkey installed, but I turned that off, and I still get the same problem. I can't think of any other things that might cause this...
UPDATE:
CRAZY! I haven't changed anything on my computer except maybe some Windows updates were installed, but now the keyboard glitches have shifted! OUH and UGH work fine now but I have discovered that OUN produces OU<N
(or ou,n lowercase), and there is another one which conveniently shows up in password I frequently use for sites I don't care about. The weird thing about the password one is that it all happens on one row, which makes the accepted answer questionable. It involves some symbol keys though.
UPDATE 2:
Now the old problems are back again, with the new problems! Aaaaagh! Actually, there is one slight variation, now 'oun' produces 'ou,' instead of 'ou,n' What is going on?!?!?