Computer Hope
Microsoft => Microsoft Windows => Windows XP => Topic started by: dmcginn on April 11, 2009, 11:05:01 AM
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Hello all,
I am running Windows XP Home Edition SP3 with a Celeron 2.2GHz CPU and 1.00GB of RAM. I am directly connected to my service providers cable modem, use windows firewall and AVG Free.
My issue is this message I get informing me "16 bit MS-DOS Subsystem" on the top of the window in blue. Inside it says
C:\WINDOWS\Sysvxd.exe
The NTVDM CPU has encountered an illegal instruction.
CS:0dc1 IP:0231 OP:63 75 74 20 69 Choose 'Close' to terminate the application.
I am under the strong impression that this is a virus, and am suprised that AVG is not able to detect / deal with it. I am tempted to just delete the file, but I wonder if there is more to the virus than just this one small exe.
Can someone suggest how I should proceed in dealing with my current situation?
Thanks for your time and help,
Dan
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You could try copying the files config.nt and autoexec.nt from c:\windows\repair to
c:\windows\system32 and make them read only afterwards.
I would advise you to make backups of the files before you overwrite them or just rename the ones in c:\windows\system32 to configbackup.nt and autoexecbackup.nt
Let us know how you get on...
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Most likely, you're infected.
"16 bit MS-DOS Subsystem" message is often associated with malware activity.
Read here: http://www.computerhope.com/forum/index.php/topic,46313.0.html
Start new topic here: http://www.computerhope.com/forum/index.php/board,7.0.html
Do NOT post any logs in THIS thread.
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Unless you have recently installed an older program designed for early ver. of Windows...