I have Windows XP Service Pack 3. Everytime I shut down my computer, Windows tries to install updates. I don't receive any error messages, but it has been doing this for weeks.
I've run Malwarebytes, CCleaner, TDSSKiller, and Combofix. I've gone to www.windowsupdate.microsoft.com
and tried to install all relevant updates from there. At that site, it tries to install: Security Update for Microsoft .NET Framework 2.0 SP2 on Windows Server 2003 and Windows XP x86 (KB2572073). It says the update was successful, but when I try to check again for updates, that one keeps coming back up as being an update I need.