jraju2489 I noticed you said something about download, did you mean the install process? And are you installing windows using the upgrade option or the clean install?
The upgrade option will not work. Ubuntu and all Linux based OS's use a different format for you hard drive, when you try to install Windows, it will not find the proper format it needs to install over Ubuntu. So, to install Windows 7 you must load it at boot, and choose to do a clean install. Remember to back up all data before doing a clean install, as everything will be "wiped clean" from your hard drive.
Edit:
This is why you got a message about the drive, not a driver. Windows just needs to format the drive so it can be installed. Formatting just sets up the drive for the filing and indexing of data used by the OS to function. Like I said, Linux uses a different format then Windows.