dtrush

I got the same issue, so I ran a packet capture and found the URL that the installer is looking for: http://download.microsoft.com/download/5/6/7/567758a3-759e-473e-bf8f-52154438565a/dotnetfx.exe This URL must have been moved. The file appears to be this one: https://www.virustotal.com/gui/file/46693d9b74d12454d117cc61ff2e9481cabb100b4d74eb5367d3cf88b89a0e71/details I think this file is not used. The workaround is to create a local HTTP server that will serve the file (or any file with the filename dotnetfx.exe). Then set an entry for "download.microsoft.com" in your /etc/hosts. You can do this easily with a few shell commands: # append the following line to your /etc/hosts file, but use your own LAN IP address # download.microsoft.com 192.168.0.9 # create the expected directory path mkdir -p download/5/6/7/567758a3-759e-473e-bf8f-52154438565a/ # create an empty file that the installer is looking for touch download/5/6/7/567758a3-759e-473e-bf8f-52154438565a/dotnetfx.exe # run an HTTP server (must be root to bind to port 80) sudo python3 -m http.server 80 With this workaround I was able to install and run Tiberian Sun.