error code 800F0203, windows update, code integrity, security essentials

Hello. I have Windows 7 64 bit. Occasionally some "optional" (not "required") security or driver updates from Windows update, fail during install. This has happened sporadically for months. I thought nothing much of it as performance didn't seem effected,

and they weren't labelled required but I want to make certain everything is updated and I don't have a virus that's going to blow up in my face. I wonder if I have two related problems: I use Security Essentials and when I do a virus scan it does not let me

do a full scan, it hangs always on CodeIntegrity. It let's me automatically and manually update the program, do a custom scan of everything else, do a quick scan, and do a custom scan of only CodeIntegrity with no problems reported. I have checked device manager

and all devices are telling me that the driver software is current and there are no updates. I'm a little confused about how to completely uninstall a video driver and then still be able to get fresh install of that if needed. Please let me know any additional

information you might need and how to obtain it.

I remember I did at one point months ago have some spyware, which Security Essentials allowed me to delete. I recognized the software which it had sneaked in on. I wish I remembered what it was called or wrote it down, but I properly uninstalled the program

from control panel, and deleted the associated folder. I suppose this may have caused a registry problem? I only know enough to know I don't want to be messing with the registry... I tried ESET online scanner, which didn't help. I did the same thing and completely

uninstalled it and removed the folder - but I guess that probably left a registry key also. Most Windows updates install with no issues. I received error code 800F0203 for this last one, which is for graphics adapter WDDM1.1 and WDDM1.2, it says. I use no

other virus or spyware software except Security Essentials (and Windows Firewall).

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