Now before anyone says the obvious, the drive I am trying to format IS NOT the drive XP is installed on. I am trying to format my secondary removable hard drive that I use solely for storage. I go into Windows Explorer and right-click on the D: drive (my storage drive that I wish to format), select "Format" from the right-click menu the format box pops up and I select OK. It gives me the obilgatory warning about erasing ALL files on the disk and I click ok. Then I get a popup box telling me it cannot format because the drive is still in use. There are no files left on the drive so I don't know what could possible be in use. I know a format can be done like this because I just finished formatting another drive in exactly the same manner. How can I find out what is running on that drive and shut it down so I can format it.