For some days now on two machines Adobe Flash has been attempting to update itself.
Each time, the installer gets to the down loader and hangs like this:
The solution, fortunately, was easy to implement – nonetheless, obscure. On my machines, all it took was changing the proxy setting in System Settings > Network:
Then select Advanced:
Followed by Proxies:
Mine machines were set to Auto Proxy Discovery like this, which didn’t work for Adobe:
Deselecting Auto Proxy Discovery, then Save > Apply solved the problem and Adobe was able to update Flash: