Are you getting an error message? If so, what. Have you tried installing the updates manually? Sometimes it is just one update not installing properly that prevents the others. Many threads I have read indicate that there is a particular problem with KB2647753 and after manual installation of that all of the others installed correctly.
I assume that you have tried the windows update troubleshooter?
start - control panel - in search box type troubleshooter - then click Troubleshooting. Under System and Security click Fix problems with Windows update.