I can't type and every letter is a different command for the computer. Letters aren't typed and different things open up. Please help me

Reboot and make sure your number lock is off.

Failing that please give us a shed load more information as your description is very vague.

Sorry for the vague description but I was posting for a friend. Rebooting worked though. Thanks

Ok np I was just about to say it may have been a sticky key problem like when u press ctrl C or V to copy and paste stuff, but instead of pressing two keys all you have to do is press one key.