Have you been able to access your BIOS? Typically, you can do so by repeatedly pressing either F2, F6, F8, or DEL during start-up (varies by system).
In your BIOS, change your boot options to have your DVD ROM as first priority and reboot with DVD in tray. This will hopefully allow you to reinstall Vista.
Let us know your findings.
HELP! I forgot the administrative password for my Dell Inspiron 1545 laptop (OS Windows Vista Home Basic). I don't know what button I hit but now the only screen that will come on says that I must enter the system password or the administrative password in order to access data. I have the installation disk that came with my laptop but when I put it in and press F12 or F2 (or anything at all), I get the same screen with the same message. I contacted Dell but their IT said they had to transfer me to another dept and that dept immediately told me they would love to help...for $129. Does anyone know a way to get around this so I can reinstall Windows Vista? I don't mind losing data and going back to the original factory settings...I just want to be able to use it again. I would appreciate any information! Thank you!