(Branched to a new discussion)
Hi Johnmustac,
As you have mentioned that you have encountered "Error Code 87" and also tried the basic troubleshooting steps to resolve it.
If you are still facing this issue, I would request you to use Adobe CC Cleaner Tool and remove Adobe Application Manager and Adobe Creative Cloud from the list.
Then you may proceed to install Adobe application which you wish to install. In case you need further assistance, please share the OS version that you are using and the name of the application that you are trying to install. If you are trying to download Adobe Creative Cloud, please use this link: - Download Creative Cloud desktop app.
Thanks,
Atul_Saini