You do not convert prel project files... you use the publish/share process to create a new file
The Elements Tutorial Links Page http://forums.adobe.com/thread/1275830 has several publish/share links for you to click and learn
There is no "Publish+Share" in Premiere Elements 10. Publish+Share/ is the Premiere Elements 11 and 12 counterpart of Premiere Elements 10's Share/.
If you have established your Premiere Elements 10 (assumed Windows 7, 8, or 8.1 64 bit) Timeline, you can export that to an .avi file and .wmv file and many other formats from the Share area. Remember, .avi and .wmv are just file extensions that wrap the video and audio compression, so, when deciding on export choices, good to keep in mind all the properties that you seek for your export. All that being said...
For avi file...
and then you set for the appropriate Presets.=
For .wmv file
and then you set for the appropriate Presets =
I suspect what generated your question was that you are not seeing the AVI and Windows Media choices under Share/Computer/.
If that is so, you need to use the thin scroll bar to the right of the choices and scroll down to AVI and Windows Media to see them
and others toward the bottom of the list there.
Please review and consider. Any questions or need clarification, please do not hesitate to ask.
You not only helped me but also helped a team from the museum where I work.
Thank you so much!
Thank you for the good news that our suggestions worked for you and your team at the museum so that you and they could move forward in your Premiere Elements projects. Great job by you all carrying through the troubleshooting.
Please never hesitate to ask questions and ask for clarification.
Best wishes to you and your associates.