16 bit MS-DOS Subsystem c:\DFNDRF~1.EXE



I get this message when I log on:

16 bit MS-DOS Subsystem

The NTVDM CPU has encountered an illegal instruction.
CS:0549 IP:4A7D OP:ff ff ff 00 00 Choose 'Close' to terminate the application.
Close Ignore

Please help me fix what is causing this to pop up every time I log on.

Wesley Vogel

DFNDRF~1.EXE is malware. Get rid of it.

UPDATE your antivirus software and run a full system scan.

UPDATE whatever anti-spyware applications that you have and run a full
system scan with each one.

You might want to start in Safe Mode to run your antivirus and anti-spyware

Running a full system antivirus scan or anti-spyware scan in Safe Mode can
be a good idea. Some viruses and other malware like to conceal themselves
in areas Windows protects while using them. Safe mode will prevent those
applications access and therefore unprotect the viruses or other malware
allowing for easier removal.

How to start Windows in Safe Mode Windows XP

Hope this helps. Let us know.

MS-MVP Windows Shell/User


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