Windows 95 build 420

This build was leaked by marcoguy on 2015-08-25. It features a switch back to the 'Final Beta Release' branding and also includes a batch script to create a Floppy installation. The shutdown screen also has a small modification to correct the ratio of the text that says "Please wait while your computer is shutting down...".

This build is also the first to require being upgraded from an older build. While builds 314 through 405 had an upgrade check, they allowed the user to do a clean install. This build removes the ability to continue installation with a clean install without a qualifying Windows product.