I tried reading the help instructions, but it lists steps that contain nonexistant messages to look for, such as “Please select the operating system to start”. I think the instructions take into account the radio-button dialog box that XP doesn’t have.
Using a plumb line, place a pulley directly above your “enter” key on your keyboard. Suspend a small weight – say, a sinker for a fishing line – above the key and tie it off suspended about a foot above the key.
Dig a pit in your front lawn
Pile whatever mattresses, sandbags, etc., you may have against your computer.
Run the line from the weight over your keyboard out to the pit in your front lawn, making sure to keep it taut at all times
Crawl into pit, line in hand
Slowly and carefully lower weight to depress “enter” key.
Works for me every time, but mowing the lawn has gotten to be a chore with all those pits.