How long have you been working with Premiere Elements 8.0 successfully? Are you a newcomer to the program?
I will start with the usual questions and then we can fine tune next.
1. Are you working with the 8.0.1 version of the program? If not, then download and install the 8.0.1 update.
2. Do you have the automatic Background Rendering and AutoAnalyzer features disabled. If not, please do so.
For Background Rendering, see Premiere Elements Editor Edit Menu/Preferences/General and the Background Rendering preference
there. For AutoAnalzyer, go to the Elements Organizer workspace, Edit Menu/Preferences/AutoAnalzyer Options and disable all those
3. Does the problem exist with and without the antivirus and firewall(s) disabled?
4. Does this problem occur only when you are opening a saved closed project and trying to continue working on the project? Does
the problem occur even if you open a new project? Can the problem happen even before you import media into the project?
Let us start here and then decide what next which might include questions about the properties of your source media, project settings,
computer resources and other as applicable.
Please review and consider.
Any questions or need clarification, please do not hesitate to ask.