Multiple windows update Errors sfc /scannow shows corrupt

I have multiple files that will not update with windows update. 1.) .Net framework 4.5.2 is failing in both windows update & I manually downloaded and it will not install. a.) When I do a manual install it says the windows installer is not installed correctly. b.) When I researched this I ended up running sfc/ scannow i.) I get the message windows resource protection...