Various Errors - winlogon.exe Bad Image, Windows - Bad Image & Window Defender

I've been receiving 3 errors upon starting my computer. I'm not sure if they are all related and I have no clue where to begin to start fixing them. Any help in fixing any of them would be appreciated. Here they are:

Error 1
winlogon.exe - Bad Image

C:\Windows\system32\KBDCA.DLL is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software venfor for support.

Error 2
Windows - Bad Image

Exception Processing Message 0xc000007b
Parameters 0x760592A0
0x760592A0 0x760592A0

Error 3
Windows Defender

Application failed to initialize 0x800700c1

Use System Restore http://www.vistax64.com/tutorials/76256-system-restore-undo.html

I don't believe that I've ever done a System Restore on this computer though...