I want to change the boot order of an Optiplex 745 that I just purchased from a local craigslist. It asks for the admin password for the "setup up lock". Contacted previous owner and none of the password info he sent is working. Need to unlock - it does not have a 3.5 floppy and it stops on boot up and you have to hit F1 to continue. I have been working on this for 3 days... no progress. Battery - jumper and other stuff tried. Tried to load a new bios and I need the password to do that also. HELP !??