Errror - Key not valid for installation in specified stateThe issue "Key not valid for installation in specified state" can be a Microsoft bug introduced in the kb2918614 update sent in August, 2014.
To solve this problem, you must open the Control Panel, select "Programs and Features", select "View installed updates" (left column), look for the kb2918614 update and uninstall (right click on the setting to date).
Restart the computer.
ID: 20150315171224NI.xml
Webpage: KPT240-20150315171224NI.htm