Hi, I Googled and found this page here Link Removed - Invalid URL seems the user has similar problem, an answer is offered ( scroll down to find ) and is to do with un-installing a certain Hotfix. Hope this is usefull. In fact to save time I've cut and pasted the answer here..
Here is the answer to your problems. Go to your control panel under add and remove programs you will see a hot fix for kb929777. Uninstall this hot fix. Windows will tell you to reboot, do it. Download the kb929777 for the windows website not the auto update site, (if you do it will install the hot fix first before the kb929777 and then kb929777 will not install again). After successful update you will need to reboot. check for updates( there should be...