― Hi All, ∙ Sometime you are blocked by system admin in your office or college to use admin rights. ∙ So this is little panic that you are restricted of some Windows XP services. ∙ Here I have solution for that how to easily change Administrator password without knowing old password. ∙ Just follow below simple steps:- ∙ 1. Go to Run and type "cmd" (without ")the press enter. ∙ 2. in command prompt type the below command ∙ net user administrator * [...].