Activation required Can't logon to computer

Hello,

I had some major problems with my DELL Dimension 510.  I used the install CD from DELL and chose Repair.   It finished loading everything fine when it first rebooted after load it said Activation required.  I activated and it said ok.  When I tried to logon it said Activation required again.  I called the activation phone # for Microsoft and got an activation # from them and activated - again it said activation ok.  But when I try to logon it says activation required again.  According to the Info I found on Dell support page you should not need to activate after loading or doing a repair from the DELL supplied CD.

 

Any help would be greatly appreciated!

 

Bob