this clearly means 2 things...
1. You have installed a computer management software, which is restricting the access to certain features...
2. You are affected by spyware/malware, which have installed the restriction, but this time, without your permission...
what i can decipher from the error message is, that the software concerned is "NetWare"...
Go to add/remove programs in control panel, and see if it is there in the list...
also, you can try this :
go to start menu, click on run, in the dialog box, enter :
control userpasswords2
press enter... now see if your accounts are correctly configured, ie, are they the administrators... if not, u can modify them to become the admin...
also, look around to see if everything seems fine or not...
if u can post a screenshot (of control userpasswords2), maybe, i can help to check if everything's fine...