Exactly what is INSIDE the video you are editing?
Codec & Format information, with 2 links inside for you to read http://forums.adobe.com/thread/1270588
Report back with the codec details of your file, use the programs below... A screen shot works well to SHOW people what you are doing
http://forums.adobe.com/thread/592070?tstart=30 for screen shot instructions
Free programs to get file information for PC/Mac http://mediaarea.net/en/MediaInfo/Download
The focus of your question is a Premiere Elements 10 project file (project.prel) and not a video file that you are trying to import into the project.
So the typical and classical questions of what is your video codec do not appear to be indicated at this stage of your troubleshooting.
Top of my list would be "Did you move, delete, or rename files and folders that went into those old projects after the save/close of those projects (assumed they were created in Premiere Elements 10 before your uninstall/reinstall of that program?")
Other considerations would be to review the Adobe document on damaged projects
Please state whether or not you can open new projects in Premiere Elements 10 without problems? And, what computer operating system is your Premiere Elements 10 running on? Just to be safe....what video card/graphics card does this computer use?
We will be watching for your follow up.
the project consists mainly of 2 avi videos of a stage event. I had 2 SONY cams filming the event from different angles.
Both cameras are HD MiniDV cams, but I transferred the tapes to the computer as PAL widescreen in standard resolution.
using the SONY´s built-in converter. (cams are FX7 and HVR-HD 1000E).
After editing the stuff and adding some titles I saved the entire project before I started DVD burning.
As it happens, a few days later I needed to make some minor changes and that´s when the computer refused to work.
(Intel Quad 3Ghz, Gigabyte MB, 4GbRAM)
It just wouldn´t boot, saying the OS was missing (VISTA). No repair function worked so I had to re-install Vista and everything else.
When the ... thing was running again everything seemed to work. I started Prem Elem 10 and opened some avi files without a problem.
But then I opened the project file I got the error message.
maybe I´m, simply not smart enough to find my way through the ADOBE website, but support for the Elements products seems
to be not as complete as you would desire...
Well, I found a workaround: I istalled my old version 7 of Premiere Elements and re-did all editing and titling.
now the job is done and I intend to look for a different video software for future movies. I´m a bit old fashioned and I like to work with a
printed manual. Especially since my video computer is never online, it is not too comfortable to us 2 pc´s alternately...
After all your hard work with your workaround using Premiere Elements 7 instead of 10 and your stated intent to go to another video editor, there does not seem much to say. I do not want to waste your time. But, if you do have a moment, please consider...
I would have been glad to troubleshoot through the details which you supplied in depth only "after the fact" as it were.
The answers are in the details.
If you got Premiere Elements 7 to work on your computer after you reinstalled Windows Vista, I would have expected that you would be able to use
Premiere Elements 10 as well. And, there are online sources for the older Premiere Elements Help PDFs
which are essentially version manuals.
If you ever want to revisit Premiere Elements as a video editor, I would be glad for the opportunity to be of assistance.
We are not Adobe here. Rather user to user. And, this user wants to wish you success using whatever video editor that you decide on..