kelvinmichigan:Thanks do know what web site has the update to 12.1. Pinnacle doesn't support that version anymore.
They don't provide technical support. However they should still provide all of Pinnacle Studio Versions Updates Downloads, which has been the case since S8, until Corel acquired Pinnacle from Avid.
S12.1 Update is on their current Downloads page (See Screenshot 1),
However, clicking on the S12.1 Update Link, returns the message in Screenshot 2.
I can't remember what s12.1 Update fixed (Probably 5:1 Surround Sound when Editing AVCHD, amongst others), however I'm Editing OK with just S12.0, here. But I only use S12 for another Program I use, Post Production.
It may be just a matter of a broken Update Link. Unfortunately there is very little meaningful communication with Corel to get it fixed, if that's the case.
Just do a Repair Install, anyway.
BTW - You need to check your S12 Version, since S12.1 was also a Released Version as well as an Update to S12.0.
SCREENSHOT 1: