Was this from the updater inside the program (check for updates) or did you manually download the update file and run it after you saved it to your hard drive?
Actually, I tried both ways.
I tried doing it from inside the program after an on-screen notification that an update was available. I only installed it on 10/15/10. That didn't work and I got the same message about closing Premiere. It was closed.
I then downloaded the update manually and again I got the same message.
Hmm... when you check Task Manager, do you have any Adobe program running in the background?
Go to C:/PROGRAM FILES/ADOBE/PREMIERE ELEMENTS 8.0 and look at the file Startup.dll.
If it shows a 2010 date, you have the update.
If not, it could be a problem with your licensing, per the FAQs to the right of this forum.
Note that you can also update the program by opening any other Adobe program (even Acrobat Reader) and going to Help/Check for Updates. This will download updates for ALL of your Adobe programs.
There are no other Adobe products running. I even checked to make sure that there were no processes running in the background that are from Adobe.
The date of the Startup.dll is 9/8/2009.
Please re-read what I said. I didn't ask if any other Adobe products are running. I just said you could install the Premiere Elements update from any Adobe program.
Thanks to Steve and John for their help. I did a disc defrag and then tried the update again and that solved the problem. Must have just been one of those bits & bytes gremlins.