Prevent Online Threats

NSD.26

Details
NSD.266

It is a dangerous nonmemory resident parasitic virus. It searches for .COM and C:\COMMAND.COM files, then writes itself to the end of the file. Depending on the system timer it sets the graphic video mode (INT 10h, AX=0013h), displays the message and halts PC:
SYSTEM ERROR: DMA DENIED.

The virus also contains the text string:
c:\command.com
*.com
NSD

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