Moving this discussion to the Premiere Elements forum.
Lopeti which version of Windows are you trying to install and use Premiere Elements 12 on?
I'm using Windows 7 Ultimate. At the same time, I installed Photoshop Elements 12, It works and starts just fine. I noted that the photoshop installed in the programs (x86) folder and the other two that are not working installed in the plain programs folder. I don't know if this is significant.
Lopeti I am sure other community members will have suggestions but you may want to start with the steps listed in Troubleshoot system errors, freezes | Windows | Adobe software - http://helpx.adobe.com/x-productkb/global/troubleshoot-system-errors-freezes-windows.html.
Premiere Elements 12 on Windows 7 Ultimate (assumed 64 bit)
If you have not already, please look at the following thread and see if the suggestions work for you.
I installed the software on another computer and everything works fine. I'll try the suggestions provided from both of you who have responded. Thanks!