is it a bios password you're talking about? (i.e. the computer doesn't even boot to windows) or is it windows password?
if it's a bios password, it will be a problem. dell d620 uses a chip to store bios password, so you will need to replace/reprogram the chip to get into this laptop. it's quite a fiddly job as the chip is very small.
if it's a windows password, you can use freeware password reset utilities. I use http://home.eunet.no/~pnordahl/ntpasswd/. there are other tools available, search google for "windows password reset".
dupalopez, June 2007