I searched the forum but couldn't seem to find a solution to my problem. I have an old Compaq Presario 9536 and I can no longer enter its BIOS. Compaq tech support didn't help but I read on their website that the button to press is F10. I've tried all the F keys and Delete but if I press it too soon I get a keyboard error. If I don't press it too soon, it just boots into Windows every time. I've heard that the time to press it is at the Compaq logo or when there is a white blinking cursor in the top right of the screen. The machine never had a Compaq logo screen and it used to have that cursor but now it doesn't. Any ideas?