Welcome to the forum.
I have not explored the download versions of the program, but with the media version, there are two different versions of PrE - the 32-bit and the 64-bit (only for Windows). Then, there is a disc with the Functional Content, that needs to be installed after the program.
My guess would be that on the download site, there will be two Windows versions, the 32-bit and the 64-bit, but have not been there. I would begin my search there. If you cannot find the 64-bit version, I would contact Adobe Customer Service, and ask for the exact URL for the 64-bit version.
Good luck, and maybe others will know exactly where the 64-bit version is located, plus what the download file's name is.
I am confused... did you buy physical discs or did you download from the Internet?
Premiere Elements 10 on physical discs had 2 versions... 32bit and 64bit
Which are you trying to install? (Install to a computer, download from the Internet)
There are direct download links at http://prodesigntools.com/photoshop-elements-10-direct-download-links-pse-premiere-pre.htm l. There are separate links for 32-bit and 64-bit versions.
Insanity is hereditary, you get it from your children