Downloading Current Adobe Flash

I tried downloading the most current Adobe Flash so I could watch things online.  When downloading it, it says that I already have the most current version.  Then when I click on the link for Flash to automatically update, it says that there was an error.  When I go to watch things online, it still says I need the current Adobe Flash.  How do I tell if I have the most current version or not?  How do I get it to work?  Thanks.