Problem accessing Adobe Acrobat Pro and Reinstalling Creative Cloud

First, I kept getting error messages claiming that I'm "Missing CRClient.dll" file, which isn't true; it's just in multiple locations, and apparently not the right one for Acrobat Pro to work. So then the prompts suggested uninstalling (1st Acrobat, then Creative Cloud), and then reinstalling.  I uninstalled Acrobat Pro; the uninstall of Creative Cloud was "with errors."  I've been trying to reinstall them both, and having an impossible time.  I keep getting the following message, which isn't helpful at all: "Error code 205: There is a problem with the downloaded file.

Error code 205 indicates that there is an issue with your downloaded file.

Solution

1. Temporarily disable your antivirus software: See your antivirus documentation for information on how to disable antivirus software temporarily.  [TRIED THIS. DIDN'T WORK.]

2. Try to use a different Internet connection: If you are connected via WiFi, try a wired connection. If you are connected via a wired connection, then try a different cable. [ON A LANDLINE. NOT POSSIBLE. ALREADY SWITCHED CABLES; NOT THE PROBLEM.]

3. Configure your software firewall: Software firewalls restrict access to your computer. Some software firewalls prompt you when a program attempts to access the Internet. Other errors could result due to the firewall’s configuration. [CREATIVE CLOUD ALREADY HAD ACCESS. TEMPORARILY DISABLING FIREWALL DID NOT WORK.]

• If prompted, allow the Creative Cloud desktop app to access the Internet.
• If you are not prompted, disable software firewalls temporarily to determine whether they are preventing Internet access. See your firewall software documentation for help.

4. Try to install the app again [HAS NOT WORKED THE HALF DOZEN TIMES I'VE ALREADY TRIED.]

I am paying a fee every month, and I expect to be able to use the software.  All I wanted to do this morning was to compile multiple PDFs into one.  Please advise; thanks much!