i have Sony vegas pro 12 cant activate i have optional authentication code and serial number came in boxed version
Just to confirm, have you tried to activate with the serial number that came with your boxed version?
Generally speaking, "Older versions of Vegas Pro [Movie Studios as well] than 14.0 are licensed under a system (as previously used by Sony) which permits use on multiple computers by one user; after an unspecified number of installations on different or updated PCs you may need to contact support to reset your "installation count"."
confirmed.
I do have the original box, serial number card: sn for vegast 12 optioonal authentification code
dvd architect serial number and optiional authentification code