I have successfully downloaded and installed Adobe Photoshop Elements and Adobe Premiere Elements with the serial numbers from Adobe.
My machine is a Sony Viao with Intel I7 core and 200 GB free on the C:/ drive.
Elements starts and runs faultlessly
Premiers pops up the User Account Control (UAC) window "Do you want the following program to make changes to your computer" Name Premiere Element 12 Publisher Adobe Systems File Origin Hard drive on this computer.
After click on YES, the UAC window closes and there is no further progress.
Opening Task Manager reveals that Premiere Elements has not opened