I installed a different os on an usb hard-drive, and when I turn on the computer, it says that so-and-so drive isn't found. The hard-drive on the computer (pc) is on, it's just looking for the usb drive.
I'd like to have it to where when I turn on the computer without the usb drive, it boots Windows 7 like it was a normal day, but when I put in my usb drive, I want to select the os I'd like to use.
My default os is Windows 7, the one on the drive is Ubuntu.
I've been tying to get this to work for 3 days, any help is help to me.