Install Windows 7 Service Pack 1 (SP1)
support.microsoft.com › en-us › windowsOn the Windows Update Standalone Installer screen, select Yes or OK. On the Installation complete screen, select Close. Try installing the service pack again. Run the Windows Update troubleshooter. If your PC isn’t able to find or install updates, the Windows Update troubleshooter might be able to fix the problem.
Install Windows Vista Service Pack 2 (SP2)
support.microsoft.com › en-us › windowsTo install SP2 using Windows Update. Make sure you are connected to the Internet. Click the Start button , click All Programs, and then click Windows Update. In the left pane, click Check for updates. Click View available updates. In the list of updates, select Service Pack for Microsoft Windows (KB948465), and then click Install .