Welcome to TSF!
I'm afraid the rules
won't allow us to provide any help with bypassing lost passwords, as there is no way to determine the actual circumstances.
If there was no password, it shouldn't prompt for one, so sounds like there actually is one.
Is the Administrator account the only one that appears in Safe Mode?
You can boot with the Win 7 DVD and use the command prompt to copy files to an external drive:
Boot with the DVD
Select your language and click Next
Click Repair your Computer
After it scans for Windows installations, select the Top option, then click Next
Click Command Prompt
You can use a Ubuntu Live CD to copy files to an external drive, to another PC over a network, or bun them to disk.
Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer
Microsoft MVP - Windows Expert - Consumer
Of course I know all the answers; I just don't always match the answers to the right questions.
Rated R for Violence -- When your PC flies through a window, that's violent, right?