What operating system are you using? Is it the 32 bit or 64 bit version?
What processor does your computer have and how much RAM? How much free space is on your C drive? When did you last run Disk Cleanup and Disk Defragmenter?
How did you install Premiere Elements? From a download or from an installation disk?
What error message do you see?
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?
-If 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