|Tay, a couple of things come to mind. First & foremost is automatic updates ( FWIW, mine're off...). M$, in it's wisdom, likes to reset your security settings (in IE, security tab) to 'high'. |
Not always, but often enough to make it worth checking. Anything higher than 'medium' blocks downloads.
Next is to make sure you're using the right critter to open software.
Again, M$ often changes associations to utilize their stuff. IE opens most (but not all) things. Take a look at 'what opens what' @: http://filext.com/ and be sure you're using the right thing.
Ed in Texas