administrator password

I’ve got a Sony Vaio PCG-Z600HEK. I was getting a lot of software problems so I did a system recovery with the product recovery CD-ROMs supplied. But now Windows wants an administrator password to start up again. I never had an administrator password or a personal password. I just used to hit the enter button when the dialogue box appeared and it would start up. Any ideas?

what version of windows is this? Windows XP?
Does it say anything on the Recovery CD?

It is Windows 2000. There is nothing written on the recovery CDs or in the manuals.

Hi,

I thought that the default admin account created with windows xp and 2000 installs was blank. If that is not working, you can try using a password reset or recovery tool. You can try one called Offline Windows Password & Registry editor. It will let you blank out any password on a windows installation. You install it either to a cd, usb stick, or a floppy drive and then boot to it. There are other tools that can do similar things as well if you do not want to try this one.

You can find it here if you want to check it out :

Offline Windows Password & Registry Editor

If it’s a disk that came with the laptop, it’s presumably a password set by Sony/the company you purchased it from. Some kind of Bart disk will sort you out Bart's Preinstalled Environment (BartPE) bootable live windows CD/DVD
Same as Wildcard above, install to a CD, boot to CD and it will have an admin password reset tool available.