freerainbowtables.com

[Nokia]

HI Ice,

Resetting the jumper on the MoBo will only reset the CMOS setting, hence the BIOS password and possibly any hard drive level password that needs to be entered before the BIOS can hand over to the OS, depending on the chip-set. It won't reset any Windows passwords, such as the admin account etc as it is physically impossible. (not sure if I am misreading your post though but you seem to be implying this.... apologies if I've misread it)

There are a multitude of third party tools that will reset a windows password, usually involving booting to a live CD or a DOS prompt - however if something like EFS is in use this will then render every encrypted file useless, unless the proviso's mentioned above can be used - if EFS is used then the way forward is to recover the passwords and usually the only way to do that is to crack it - the best way to crack it is by using rainbow tables.

(My company often gets employed by SME's to recover a forgotten local admin password that is in use on multiple non-domain work stations - it would be pretty expensive to reset each and every one, but by cracking one admin account, all local admin accounts become accessible that use the same password)

Pen testers use rainbow tables extensively - as do malicious users - but this can be said about almost anything I suppose.