Little known fact—Adobe Flash has to be installed on BOTH Internet Explorer and any alternative browser you have even if you don’t use them.
Well known fact—Installing Adobe Flash is a pain in the backside.
The official method is to go to http://www.adobe.com/ click on “Get Adobe Flash Player” and follow the instructions remembering to un-tick the undesirable “free offers” on the way. It goes on to perform up to two restarts of the browser using a download manager.
This process is incredibly complex, unnecessary and very prone to failure. On one of my systems the Download Manager aborts, on another it is blocked by a firewall I don’t control; on a third it wants missing plugins—just the ones I am trying to install! Even if it works you can end up with more stuff than you want.
They haven’t made it easy to avoid, whatever route you take you always get to the same “Agree and Install Now” button, but there is a way. Near the top of the Flash player install page is a link titled “Different operating system or browser”. Clicking that takes you to a menu page—select the OS you are using and Continue. Now you get two choices “Internet Explorer” and “Other Browsers”. You CANNOT select the browser you are using—that will take you straight back to where you started; but if you select the other one then the “Agree and Install Now” button does a straightforward download of an executable (without any free extras). The trick is to use each browser to download the code for the other one and then just run them. If you need them on other systems then put them on a memory stick, it saves a lot of time.