Vista Update Problem

Gateway GM5457E, Vista Home Premium 32 bit SP2 Memory 4 GB

About 2.5 weeks ago, I was surfing the net using IE 9 when a suspicious dialog box popped up (I think it promoted guarding against a Vista security vulnerability). I was going to shut down IE using Program Manager, but accidently hit Enter rather than the Del key when hitting Ctrl-Alt-Del & the dialog box disappeared. Nothing obvious happened at the time. I performed a scan using McAfee (which was in autoprotect mode all along) and Malware Bytes & came up negative. Several days later while using Outlook, I clicked on the Delete message icon for a routine email. Most of the white areas on the screen turned pink and a few seconds later the screen went black. Rebooted a few times, but display remained black. I removed the DVI cable connecting the graphics card (Nvidia GEForce 7500) with the monitor & connected the card to the monitor via a VGA cable. Booted using Safe mode with networking. The display worked, but had many yellow vertical lines (with moving fine horizontal short yellow lines) - difficult, but not impossible to read the display. After changing the display to VGA (from the Nvidia driver) I was usually able to boot up in normal mode. During boot ups Windows detected problems and attempted to fix them. One thing it did was to restore to an earlier version, but I'm not sure how many restorations were attempted during numerous reboots. During this time I noted that Windows update indicated that some Windows updates were not installed. I ignored this for the moment under the theory that the restorations were going back to a time before the latest updates had been installed. The video trouble shooter said the graphics card driver was corrupted. Uninstalling the old driver & downloading new driver & installing didn't help. Under the theory the graphics card was fried, I replaced the graphics card with a EVGA GeForce 8400 GS & installed the newest driver. DVI graphics were now restored. The computer seems to run normally. Now we get to the stuff I can't fix - the Windows updates.

The following updates were not correctly installed: KB2918614, KB2943344, KB2937608, KB2976897, KB2976627. During the reboot after installation, the message "Updates were not configured correctly Reverting Changes" appeared. Retrying didn't help. I tried to install each update individually & was able to successfully install KB2943344 (.NET 3.0 Security update). The other updates have resisted all my attempts listed below. I consistently receive the following error code: 8007371C. I downloaded the Sophos Antivirus tool & it found a couple of viruses (I didn't see that it named them). I also uninstalled Malware Bytes & did a cameleon install & it found a trojan. I uninstalled McAfee & installed Microsoft Security Essentials & a scan found a virus. Security Essentials says my system is being monitored & protected. It also says the definitions are up to date. But when I manually attempt to update the definitions (KB2310138) Security Essentials says the update fails & gives an error code of 0x8007042C.

I've tried most of the solutions (it seems like all) at MS Support for both malware & update problems. I've performed the steps given in Read & Run Me First. The requested logs are attached.

 

Let's see if I can manage some competance here.

 

Alas, Windows Repair did not solve the problem. Windows Updates still do not work. Thanks for you help. I'll try the software forum.