I have a sleep and power button on my PC but Windows 7 doesn't let me change what the sleep button does. It isn't even an option - it doesn't think I have a sleep button. When I press it the PC restars, but not properly. The safe mode screen comes up. This is what the options look like: http://i35.tinypic.com/2czdcer.png It should ask me what to do when I press the sleep button. How can I actually get it to use my sleep button? Thanks in advance.