If you are facing problem like cannot install or uninstall programs in windows 7 / 8 / 8.1 then
Microsoft has released a Fix it that will automatically diagnose any problems that you may be facing while installing or uninstalling.
Just go to the given link and click run now->
The problem you were having earlier it must be fixed now. Don't forget to say thanks and if still you are facing any problems then just comment below.