Hi, I hope someone can shed some light on my problem.  My operating system is Windows Vista Home Premium and in the last week the following message started appearing when I log on.

C:\Windows\system32\runonce.exe

followed by :

16 bit MS-DOS Subsystem

The NTVDM CPU has encountered an illegal instruction.

CS:11F6 IP:63 00 63 00 65

Choose Close to terminate program.

 

When I choose "close" the sytem starts up as normal, although much slower, and then everything appears to be running ok. 

I can't remember adding anything new to the system lately, however, I did receive an email with a hoax message regarding "

http://www.symantec.com/security_response/writeup.jsp?docid=2002-011511-

0444-99&tabid=1

Has my system been infected by a virus or is this a trojan or similar?  I have checked several forums, but none have given a solution directly to my problem.

I am grateful to anyone who can help me. 

Thanks