If you have recently done a fresh installation of Windows 7 and the update utility will not run any updates, you must install a few hotfixes first.
KB3168965: https://support.microsoft.com/en-us/kb/3168965
KB3145739: https://support.microsoft.com/en-us/kb/3145739
KB3078601: https://support.microsoft.com/en-us/kb/3078601
KB3164033: https://support.microsoft.com/en-us/kb/3164033
KB3109094: https://support.microsoft.com/en-us/kb/3109094
If the updates still aren't working you can use this one as well:
KB3138615: https://support.microsoft.com/en-us/kb/3138615
or you can just download the entire update package here, but you might need to install the hotfixes first.
Service Pack: https://support.microsoft.com/en-us/kb/3172605