Using Win 7 Home Premium. A few days ago one of the updates, I do not know which, did not install and the computer just locked up in the process. I had to reboot it, and the message came up that I could do a repair because the computer -- a laptop -- would not boot. I accepted the repair process of the operating system, and it booted. Well, the next time I did updates -- set for automatic -- some of them did not install, and I received the error 80070490. I did a Google and got into one of the sites indicating I could repair this easily with their program. I realized, during the scan, I did not want to do that, so I uninstalled it, with some 4000+ errors it said I had. Went to the Microsoft site and found their repair tool for Win 7, VERY LARGE DL, and ran that. Some still will not install. In looking at the history, from 5/4/13 until 5/22/13, all failed except the Windows Defender. The Windows 7 update, KB2647753 has failed several times, and some of the security updates also have failed repeatedly. This is a Lenovo laptop and I have no Windows disc with it, just the recovery tool provided, built in to it. Suggestions as to how serious this is, and how to repair it? thanks for your help.