Can someone help with my download of inDesign CS6?

We bought inDesign CS6 online, but it didn't come with a disk. Instead I was prompted to go to the following link http://helpx.adobe.com/x-productkb/policy-pricing/cs6-product-downloads.html

After downloading CS6 Design Standard (files 1 and 2), the larger of the two files was saved to my download folder as a 7Z file. The smaller file was the "extractor." I click on that and it gives me the folder location box, then I click next. At that point, the following message appears: "A problem occurred while extracting some files. Check available space on your computer and the write privileges on the destination folder" After click OK, this message appears: "A problem occurred while extracting the archive. Please try downloading the Adobe CS6 Design Standard again." After clicking OK, this is the last message that comes up: "Exception EListError in module DesginStandard_CS6_LS16exe at 0001B6E3. List index out of bounds (0)," accompanied by the dreaded red X.

This wasn't a cheap purchase. And my computer is only five months old, so memory shouldn't be an issue. Does anyone have any suggestions? For starters, an idea on how to open a 7Z file? Any and all help would be greatly appreciated. Thank you!

Dan