Can't get to Flash Player download page.

Flash Player is a built in component of Edge and Internet Explorer on Windows 10.  It's literally baked into the browser.  There's nothing separate to download or install, and updates are delivered via Windows Update.

What I'm guessing is happening, is that you're visiting a website that tells you that you need Flash Player, but in fact, you already have it.

Here's my generic advice for that scenario:

First, confirm that ActiveX Filtering is configured to allow Flash content:

https://forums.adobe.com/thread/867968

Internet Explorer 11 and Edge introduce a number of changes both to how the browser identifies itself to remote web servers, and to how it processes JavaScript intended to target behaviors specific to Internet Explorer. Unfortunately, this means that content on some sites will be broken until the content provider changes their site to conform to the new development approach required by modern versions of IE.

You can try to work around these issues by using Compatibility View:

http://windows.microsoft.com/en-us/internet-explorer/use-compatibility-view#ie=ie-11

If that is too inconvenient, using Google Chrome may be a preferable alternative.

If you're using old desktop software that requires Flash Player, it's quite possible that you'll need an updated version of the software (ancient versions of QuickBooks are a good example).  In those instances, applications frequently "got" Flash Player by embedding an instance of Internet Explorer into their application, and they made assumptions (reasonable at the time) about where and how they should check for the presence of Flash Player.  Because of the architectural changes to IE and Edge in modern versions of Windows; however, those assumptions may not necessarily hold true, and you'd need an update from the application developer themselves to get around it.

If neither of those apply, please take a step back and just explain what you're trying to do, and what the symptoms you're experiencing are.  The context will probably help us give you a better answer.

Thanks!