ta bu shi da yu writes "Sometime ago, Microsoft was accused of changing Windows Update (WU) to automatically download and install updates, even if users changed the auto-update setting off. This was denied by Microsoft. Well, it appears that they were right. Windows Update doesn't automatically install patches. According to Windows Secrets the culprit is MS OneCare. It appears that it automatically switches the updates to automatic without any warning to the end user. Given the problems with OneCare (deleting mail, flunking anti-virus tests and now this issue), is it really worth the effort?"