sp3 to sp2 in windows xp pro

[75cab]

I'm trying to remove sp3 and downgrade to sp2 in windows xp pro. I removed sp3 with the remove provision in control panel and lost my activation. I need sp2 so I can run some rockwell software that is only sp2 compatible.

[submix8c]

?Clueless as to how that could have happened.

Go through Activation, select "I want to call MS to activate", call the number given, give the long number string as the message asks you, enter the number strings it says to put in at the end, and if you're legit, your installation will be reactivated.