Windows 7 is usually pretty good about warning you before you might do something damaging and a hard drive format is no exception.
Click OK to the warning message about formatting the drive.
Warning: Just as the warning says, all the information on this drive will be erased if you click OK. You can't cancel the format process halfway through and expect to have half of your data back. As soon as this starts, there's no going back. There's no reason for this to be scary but I do want you to understand the finality of a format.
