Suppress popup error message when booting with no keyboard

To get around the errors that popup when NT is booted up without a keyboard or
mouse, use the following hack which controls system hard error messages. To run
an unattended server, use mode 2. :

Key: SYSTEM\CurrentControlSet\Control\Windows
Value: 2

The legal values are:

  • 0 : errors are serialized and wait for a response
  • 1 : if the error comes from the system, then it is written to the system
    log; no user intervention is required and dialog boxes are not displayed. If the
    error does not come from the system, then the system continues in normal
    operating mode.
  • 2 : errors are written to the system log; the dialog box is not

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