That is of course only if your region settings are software linked and not hardware set.
If your DVD drive is hardware set - then you can only chane it 5 times as a poster has already noted.
Logically, all hardware must be registered by the (computer) system, otherwise the devices (harddrive, disc drives ect.) wouldn't work. If a device is not registered, it can't be detected by programs relying on it. As mentioned before, once you've set your drive to a certain region via the "My Computer" settings and exceeded the 5 times, you'll stuck with that region setting.
Consequently, some geeks out there weren't happy with those restrictions and therefore developed software to overcome this.
That's why no matter what region your disc drive is set to by the operating system (Win2k, XP, ME or whatever), this software
will overwrite it (or bypass) and will allow you to watch DVDs from any country you wish (region 1,2,3).
Which means, if you don't run the descrambler software, your computer will use its hardware settings but the moment you launch the software, it kinda outsmarts your computer. I'm sure you can get a trial version at the beforementioned web sites so why not give it a try?
zufan, to your question re the error msg ... did you have a disc inserted while you were trying to change the region settings? Sounds as if you had a region 1 DVD (USA) in the drive during the procedure. If that's not the case it might have to do with the admin stuff. Can't help you there, I'm not familiar with Win2k.
t.