Cannot keep puter error free

Can someone explain the following error codes
I am not sure of the order as i wrote then on sticky notes 6 of them, so a
bit messed up.
Going nuts please help
A DOS like window opens up with '16-bit MS-DOS Subsystem' at the top. I do
not know where it comes from either.

#1 Message is:

16 bit MS-DOS Subsystem

C:\wefds.exe [notice only one backward slash]

The NTVDM CPU has encountered an illegal instruction.

CS:054f IP:0124 OP:63 65 65 64 65

Choose 'Close' to terminate the application



#2 Message [same time]

Get IUMS

MSDART.DLL

The procedure entry point RemoteAssistancePrepareSytemRestore could not be
located in the dynamic link library. WINSTA.dll

NOPDB

Error Signature:

szAppName: szAppVer: 0.0.0.0 szModName: sdntdrv.dll

szModVer: 7.0.0.24 Offset: 000055e6

Files:

C:\\WINDOWS\TEMP\WER48.tmp.dir00\nopdb.exe.mdmp

C:\\WINDOWS\TEMP\WER48.tmp.dir00\appcompat.txt

C:\\WINDOWS\system32\winhlpp32.exe

W32.HLLW.Gaobot.gen

C:\\WINDOWS\system32\winhlpp32.exe

W32.HLLW.Gaobot.5A

C:\\WINDOWS\system32\winhlpp32.exe

W32.HLLW.Gaobot.gen


Thanks for any help
Bruce