In the middle of typing a word document the letters on the keyboard display
different letters than the ones I've typed.
For awhile I thought the keyboard was haunted but this happens frequently.

FOr instance, I'll type a "B" but on the monitor in my word document, an "o"
will appear. It happens with no warning. I have to shut down the computer
twice and reboot in order for the "bug" to get out.
Now for instance, while typing through the Web, I am having no problem. I
only get the problem in word documents.
Please help!