QUOTE (Douglas ONeill @ Dec 29 2007, 07:40 AM)

I am having the dreaded invalid product key problem when I try to activate the mpeg-2 codec. Strangely though, the problem did not occue before I installed the 9.1 patch for Windows Vista?
Any ideas anyone?
Thanks
Doug
Basic System Specs (Own built PC)
* Vista Home Premium
* 2Gb RAM
* 320 Gb WDC HDD (only 20 Gb used)
* Intel Quad Core 2.4 GHz CPU
Exact thing happened to me after I installed the 9.1 patch. Unfortunately, you must go through a clean install to restore EMC9 to the way it was. I see you have Vista so you may actually need that patch. I have XP so I didn't really need the patch, but thought it couldn't hurt to update. Boy was I wrong!! Good luck.
Rachel