The Dell system BIOS is the unique key to activating Windows 7 Ultimate and Enterprise both on a Windows 7 clean install or on an activation for an existing Windows 7 installation. The hardware password for Windows 7 Enterprise and Ultimate is the BIOS password. The hardware password for Windows 7 Home Premium is the BIOS password.
If you have an original purchase receipt of the Dell system and can also prove this with a COA then you may be able to get the system back after the activation as the system date and serial number were not changed. The activation key/serial number pair is kept by Microsoft as one of the security measures to stop users from cloning license keys/serial numbers. If you get the system back then you will need to get a Dell OEM license key from Dell
Do not mess around with the BIOS. If you have not done this before the system is your hobby and you need to research. The drivers should be in the CD and a few downloads should be possible on the net as well. You should have less difficulty if you buy the system on the net and have the CD's drivers pre installed. Dell sell no drivers for Windows 7 in their web site. If you have a backup you may use it as an installation source. If you have no backup then you may have to clean install Windows 7 from a CD if your driver DVD is not working. I dont recommend this but it may be the only way.
If you have a Dell restore DVD you may use it as an installation source to Windows 7 but you should be prepared for a very long time to download. A restore DVD will update your BIOS and most likely not overwrite all your application programs and settings. See notes on removable media:
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