These days some of the 64 bit windows 7 users are not able to install some windows 7 updates even if your windows is genuine, this is due to the inconsistency found in windows 7 64 bit OS only.
Microsoft has just released a System Update Readiness Tool for Windows 7 is being offered because an inconsistency was found in the Windows servicing store which may prevent the successful installation of future updates, service packs, and software.
This tool checks your computer for such inconsistencies and tries to resolve issues if found, Here is how this tool actually works and read on further to know about this tool
The System Update Readiness Tool for Windows 7 for x64-based systems (KB947821) [January 2010], has been released to fix an inconsistency in windows 7 x64 based OS.
This tool will download and install the not downloaded updates in windows 7 64 bit automatically and fix all the update issues in windows 7 64 bit.
Download System Update Readiness Tool for Windows 7 For 64 bit OS | Please note that in order to download this tool you will need to have genuine windows 7