The administrator does not mean your account does not have to follow permissions on files, registry entries or restrictions. To sort this out I usually have to do more research on the error message but here's what I find most of the time. MALWARE DAMAGE.

Correction includes removal of the malware but that does not repair the damage. To repair the damage requires your skills at Windows 2000, the registry (most of the time) and google.

However does not find that error message and it's not one I've seen.