From the Premiere Elements Information FAQ http://forums.adobe.com/thread/1042180
•What version of Premiere Elements? Include the minor version number (e.g., Premiere Elements 12 with the 12.0.1 update).
•What operating system? This should include specific minor version numbers, like "Mac OSX v10.6.8"---not just "Mac"
•Has this ever worked before? If so, do you recall any changes you made to Premiere Elements, such as adding Plug-ins, brushes, etc.? Did you make any changes to your system, such as updating hardware, printers or drivers; or installing/uninstalling any programs?
•Are you using an account with Administrator Privileges?
Run as Administrator http://forums.adobe.com/thread/969395 (Encore + "All" Premiere)
•Have you installed any recent program or OS updates? (If not, you should. They fix a lot of problems.)
•What kind(s) of image file(s)? When talking about camera raw files, include the model of camera.
•If you are getting error message(s), what is the full text of the error message(s)?
•What were you doing when the problem occurred?
•What other software are you running?
•Tell us about your computer hardware. How much RAM is installed? How much free space is on your system (C:) drive?
And some other questions...
•What are you editing, and does your video have a red line over it BEFORE you do any work?
•Which version of Quicktime do you have installed?
What is your exact brand/model graphics adapter (ATI or nVidia or ???)
What is your exact graphics adapter driver version?
Have you gone to the vendor web site to check for a newer driver?
For Windows, do NOT rely on Windows Update to have current driver information
-you need to go direct to the vendor web site and check updates for yourself
ATI Driver Autodetect http://support.amd.com/en-us/download/auto-detect-tool
nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us
nVidia Driver Rollback PreElements-10 http://forums.adobe.com/thread/1317675
Dual video problems - Do you have dual graphics adapters?
Go to the Windows Control Panel and select Hardware and Sound and then select Device Manager... In Device manager you click the + sign to the left of Display Adapters... and see if 2 are listed
IF YES, read below
-link to why http://forums.adobe.com/message/4685328
-HP Fingerprint/Password conflict http://forums.adobe.com/thread/911575
-Mac Utility http://forums.adobe.com/thread/1017891?tstart=0
Lots more details needed to help us help you. Anything along the line that you do not understand, please let us know.
What version of Premiere Elements are you using? For the purpose of this initial reply I will assume Premiere Elements 12/12.1 (there is no 12.0.1) on Windows 7, 8, or 8.1 64 bit in a NTSC setup.
1. What antivirus program does your computer use and does the problem exist with or without the antivirus disabled?
2. Are you running your computer and programs from a User Account with Administrative Privileges as well as using Run As Administrator by right clicking the Premiere Elements desktop icon?
3. Do you have the latest version of QuickTime installed on your computer with Premiere Elements?
4. How would you describe your situation "it worked before but not now" or "it never worked before"? Are there error messages associated with any of these crashes? And, if you go to Computer/Manage/Event Viewer/Windows Logs/Application, do you see any messages there that give any information as
to the nature of the crash that had just occurred?
5. Did you install Premiere Elements to the default installation location or did you customize the program's install location to other than the Local Disk C?
6. Computer resources and video card/graphics card updates would should be included in the exchange of information if indicated as the discussions progress.
Let us start here and, based on your reply, we will decide what next to customize a troubleshooting strategy for your Premiere Elements issue.