Admin rights totally missing.

Have a windows 2000 pro machine that I installed sp4 on. Afterwards it would blue screen with an ntoskrnl.exe error. I reinstalled 2000 over the top of it and was able to bring the machine up. The problem is when I try to load drivers with the admin account I get do not have sufficent rights to install the drivers. Even if I go and create a new account and put in the admin group I still get insufficent rights. Doesn’t anyone have any ideas or have came acrossed this? Thank for any input that you provide.