When I go to open the program it says I have an invalid serial #. Music Maker and PC tuneup opened fine with Serial#.Please help
Welcome to the Magix user to user forums.
You've posted your question to the Xara Designer Pro area of the forum, but then mention Music Maker and PC Check and Tune.
Assuming you have bought XDP it would have a completely different serial number to Music Maker. Did you check the email you received when the purchase was confirmed? It should include the specific serial number for XDP.
Jeff
Forum Moderator