VIDEO FOR WINDOWS: KNOWN PROBLEMS OR ERRORS 
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If you send data through the wave mapper with a mapped
   format and with looping enabled, the looping is still
   ignored.


Versions of ATI's video accelerator prior to 2.1 do not
   work well with Video for Windows version 1.1. Installing 
   the accelerator software after installing Video for 
   Windows can overwrite Video for Windows version 1.1 
   components with components from the previous version.
   Avoid installing any version of the video accelerator 
   unless it is specifically noted to be compatible 
   with Video for Windows version 1.1.

   The vidc.rlec=ativdacc.drv entry in the [installable 
   compressors] section of the SYSTEM.INI file can cause
   problems when playing large RLE-compressed movies. 
   Remove this entry from the SYSTEM.INI file.

   For update drivers, contact ATI Technologies Inc.


If you experience load segment failures of any kind after
   installing Video for Windows change the following line
   in your SYSTEM.INI file:

device=dva.386

   change to

;device=dva.386

   This disables the dva.386 driver and the load segment failures
   should disappear.