How to change the windows password with out knowing old password -: Dear BestHacking readers today I am going to tell you a trick to change windows password without knowing it. As you all know without knowing the old password we are unable to change it but by following the few steps given below will help you to change it easily. This trick works for Windows Vista, Windows XP, Windows 7, Windows8. Procedure For Changing Windows Password Without Knowing Old Step 1 : Start Menu > Computer > Right Click > Manage Step 2 : System Tool > Local User and Group Step 3 : Double Click on User (exp. your Pc Name ) Step 4 : Chose User > Right Click on It > Set Password Step 5 : Click on Proceed button Step 6 : Then Set your New Passowrd