Help! My Dell Inspiron 1545 factory loaded with Windows XP Professional is now so hopelessly messed up after a bootup problem, I want to do a clean reinstall of the software. I get to the licensing agreement and try to agree by pressing the F8 key and get nothing. I can ESC and I can page up and down through the agreement, but the F8 key does not seem to be functioning. Someone suggested the function key may be locked? But, if so I don't know how to fix that.