Wacs crash with error messages about 16 bit subsystem or ntvdm.exe
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Error message
If you experience problems with Wacs crashing or freezing during transfer of data, and error messages reports problems with the 16 bit subsystem or Ntvdm.exe, then this workaround can help.
Workaround
In the C:\Window\System32\ directory there is a file called Config.nt. This file is equivalent to Config.sys in the old 16 bit MS-DOS environment. A setting in this file is:
files=40
Change this to:
files=100
to increase the number of files that can be open at once in an 16 bit application. The maximum number is 200.