How can i get Adobe Flash Player on my hp slate 21?

Adobe Flash Player has been discontinued and is no longer supported, which means you cannot download or install it on devices, including your HP Slate 21. However, you can use alternative methods, such as enabling Flash support in Web Browsers that still provide limited functionality for Flash content, like certain versions of Puffin Browser. Additionally, consider looking for HTML5 alternatives for the content you wish to access, as many sites have transitioned away from Flash.