I am having the same problem as "yraG128". While attempting to install PSE12 on a Windows 8 PC I get an error message: "The installation process has encountered an error while installing Shared Technologies. Please restart your system and try again."
I have also followed the directions provided at the link I show below; namely, delete the two files, reboot and install PSE again. I did this 3 times. (Insanity=Trying the same thing over and over and expecting different results.) Yep, I guess I'm guilty.
PLEASE...CAN SOMEONE AT ADOBE PROVIDE ASSISTANCE?
Thank you.
Here's the Help link that I refer to above. The "solution" did not correct the problem: