Nothing shows up at login screen

So what can I do to fix my login problem? Any ideas?

Did you happen you make any additional changes under the boot tab of MSCONFIG? Like under the advanced options button did you change anything relating to the number of processors or Maximum memory?

No, that was the only thing that I did.

Well, I am pretty well out of ideas--

Try running the Windows Defender Offline to see if it finds anything.

But since it seems Winlogon, wininit, or userinit may not be working, perhaps you could run a system file check from offline. If a virus has renamed one of these utilities in the registry, it may not help.

How to Run the System File Checker (Sfc.exe) Offline in Windows 7 and Vista - The Winhelponline Blog

If that doesn't help, perhaps starting the hidden admin account will help, but you may not be able to if you are not logged in.

net user administrator /active:yes

Beyond that, possibly a re-install...but make sure you have done a complete shutdown at least once to test.

As Saltgrass indicated in an earlier post in this thread, you may still have some remnants of the previous infection impacting how your system boots.
Did you follow up with his suggestion about running an offline virus scan with the link he provided.
Also you may want to check this key
HKEY_LOCAL_MACHINE\SOFTWARE\MicrosoftWindowsNT\CurrentVersion\Winlogon
for the value of the Shell and see if it still reflects explorer.exe

Doing that scan thing right now. Having it scan everything, so I've got time to make a sandwich. I'll let you guys know how it goes.

Okay, the scan finished and said it found corrupt files, but was unable to fix some of them.

Regardless, this seems to have fixed my login problem. Thank you guys so much.

Good to hear.
Follow up with a full virus scan. Since your current antivirus seems to have let you down I would suggest uninstalling it completely follow that up with the vendor specific proprietary removal tool, some of which can be found here Security Software | SingularLabs
Install MSE from here Spyware Protection | Free Spyware Protection | Microsoft Security Essentials update and run full system scan.
Grab the free version of Malwarebytes : Malwarebytes Anti-Malware PRO removes malware including viruses, spyware, worms and trojans, plus it protects your computer install it, update it and run a full system scan.
And don't forget to turn System Restore back on.
And thanks to Saltgrass (Clark) for his solution to this problem.
Regards
Randy