Premiere Elements 13 on Windows 10.
Does the problem exist with and without the antivirus disabled?
Is your video card/graphics card up to date according to the web site of the manufacturer of the card?
Does the problem exist with and without the preference "Use Hardware Acceleration (works on Intel HD Graphics 2000 and higher)" disabled?
Do you have the latest version of QuickTime installed on your computer and are you running the programs as administrator?
With the Timeline rendering....
a. do you have the gray tabs of the Work Area Bar spanning the whole Timeline content? What are the properties of the content that you are trying to Timeline render to get the best possible preview as viewed in the Edit area monitor?
b. Have you installed any new programs, plugins, or codecs?
c. If you ignore Timeline rendering does the program allow you to continue to a successful export to file or burn to disc?
I have Premiere Elements 13/13.1 on Windows 10 Home 64 bit and Windows 10 Pro 64 bit and have not experienced the problem that you describe. My general impression is that Premiere Elements successes and failures are the same before and after upgrade to Windows 10.
Please review and consider and then we can decide what next based on the details in your reply.
"Does the problem exist with and without the preference "Use Hardware Acceleration (works on Intel HD Graphics 2000 and higher)" disabled?"
The instance I changed this preference it startet working again.
Thanks a lot!!!
Thanks for posting the outcome from the suggestions. Great news that the disabling of the Intel HD Graphics 2000 and higher related preference worked for you. Interesting result...typically I have seen enabling and disabling of that preference impacting exporting but not Timelline rendering related to Edit area previewing. Good information to have in the user troubleshooting toolbox.
Great follow through.