Ok - in that case it is the Windows password and not the BIOS password, as the BIOS password prompt is a very stark black and white screen.
Do you care about the files on the system? If not, you can reinstall Windows, wiping out the existing files. I don't know if there is a way to determine the Windows password. You're hampered by the inability to mount the disk somewhere else (unless you happen to have a RunCore SSD
installed with the USB port.)
I suggest you Google "Windows 7 password recovery" and see where that takes you. I'll caution you that offers of tools may actually be supplying malware, so tread carefully.