Is it a netware password prompt you are looking at?
The windows one can be easily bypassed by pressing escape or clicking cancel. Booting with the ctrl key down will take you to the boot prompt screen where you can choose safe mode. It is a good idea to boot to safe mode or bypass the pw into windows so you can see what hardware you have and make sure the drivers are easily found.
After that you will want to wipe and reload all the same.