All of a sudden, CTRL+SHIFT does not do its thing, highlighting (+end to end of file, +home to start of file etc.). It does either NOTHING, or, if FireFox is running on the computer, it SWITCHES to Firefox. This only happens in Word. In text editors the same shortcut works fine. Reopening Word, changing files, rebooting computer are all of no avail.

wiping out the normal.dotm and starting fresh did not solve the problem, either ... Can anybody help?

Thanks in advance
Emil