can anyone tell me how to format my hard drive from the desktop?
If it's your boot or main drive you can't. If it's a slave You have to go to COntro Panel, Admin tools, COmputer management, then disk management. Right click on the disk you want to format and click format..
If it is your main drive, I'm not sure why you'd want to format it. But if you must boot from your OS installation disk, you can format from there.