win2000的使用者可以照下面的方式來reset區碼
http://www.inmatrix.com/articles/win2000.html

This information may or may not work, and if it does, it will only work with unlocked region-free (RPC-1) drives. Use this information at your own peril.
load REGEDT32 and go to [HKEY_LOCAL_MACHINE/Software/Microsoft]. You should see a strange looking random letter key (for example "`dv:=/") as the first entry... Delete the entire key. Reboot the machine and... you're back to region 1 with 1 change left.... Works every time... try it and see.

Versions 3.75 and later of DVD Genie should be able to find this key for you and allow you to backup and erase the key with ease.

This method has been confirmed to be working with Windows 2000 Service Pack 2.