Hi,
Thank you for posting your query in the Microsoft Community forum.
Let me try and help you with this issue.
It is possible that some system files are misplaced or corrupted.
I would suggest you to follow these methods and check if it helps.
**Method 1:**This is the fix that has helped many customers fix similar issue.
For "Key not valid for use in specified state" errors try moving the folder RSA from C:\Users<User>\AppData\Roaming\Microsoft\Crypto\RSA to say C:\RSA (just in case there should be a need to restore it) then try installing again. This folder appears to act as a cache and should be rebuilt automatically as required.
**Method 2:**If that does not help, run the System File Checker(SFC) scan and then try downloading the programs.
SFC scan replaces the corrupted system files with the original version of Windows files on the computer.
Use the System File Checker tool to troubleshoot missing or corrupted system files on Windows on Windows 8http://support.microsoft.com/kb/929833/en-us
Let us know if it helps. If you have further queries, we will be happy to help.