Out of date flash player

If you've accumulated a collection of the installers themselves, they're no longer necessary once you've run them.  Their job is just to deliver the payload and put the files in the right place in the bowels of the computer.

I'd highly recommend turning on Automatic Updates in Flash.  You can do that from Settings > Flash Player > Advanced > Allow Adobe to Install Updates (recommended).  This will ensure that Flash stays updated automatically (regularly patching your OS, Browser and Plug-Ins like Flash are your best primary defense against malware infection), and will save you from manually messing with it.  Keeping track of what needs patching given the modern pace of updates is a lot of work for an individual.  It's way better to just set it and forget it.