Welcome to the forum.
- What computer OS version are you running PrE 10 on?
- Does your computer have an nVidia video card/chip (GPU)?
- If it does, please see the ANNOUNCEMENT (#1) at the top of the main forum page - there is a problem with the latest nVidia video drivers, and PrE 10.
- If you do not have an nVidia GPU, please tell us the full details of the Video Clips, such as Frame Size, FPS, Compression/CODEC used in them.
- When you set up a New Project, what Settings did you use?
Good luck, and remember if you DO have an nVidia GPU, please see that ANNOUNCEMENT at the top of the main forum page.
What video card does your computer use? If NVIDIA GeForce on Windows, you mostly likely have been hit with the Premiere Elements 10 NVIDIA display issue that is described in the Announcements at the top of this Forum. For your convenience, the following is a copy/paste of that Announcment
Announcement: Premiere Elements 10 NVIDIA Video Card Driver Roll Back
If you are a Premiere Elements 10 user whose Windows computer uses a NVIDIA GeForce video card and you are experiencing Premiere Elements 10 display and/or unexplained program behavior, then your first line of troubleshooting needs to be rolling back the video card driver version instead of assuring that it is up to date.
Since October 2013 to the present, there have been a growing number of reports about display and unexplained workflow glitches specific to the Premiere Elements 10 user whose Windows computer has a NVIDIA GeForce video card. If this applies to you, then the “user to user” remedy is to roll back the NVIDIA GeForce video card driver as far as is necessary to get rid of the problems. The typical driver roll back has gone back as far as March – July 2013 in order to get a working Premiere Elements 10. Neither NVIDIA nor Adobe has taken any corrective action in this regard to date, and none is expected moving forward.
Since October 2013, the following thread has tried to keep up with the Premiere Elements 10 NVIDIA reports
Older NVIDIA GeForce drivers can be found
A February 2014 overview of the situation as well as how to use the older NVIDIA GeForce drivers for the driver roll back can be found
The fix to the problem is not to make sure that you have the latest video card driver version, but rather to roll back the driver as far as necessary to get Premiere Elements 10 to work for you. The 2nd link cited above tells you where to get older NVIDIA GeForce drivers and the 3rd is an overview of the details and how to fix problem.
Please review and then let us know the outcome.