On some Windows systems/machines, dviout seems to be freezed when launching METAFONT or Ghostscript.
Not that this does not mean that dviout is hanging; it's just waiting for the launched program to return.
This problem, probably due to the Windows system or environment, can be solved in one of the following ways.
1. If mktexpk or MakeTeXPK is indicated in -gen:, set its full pathname with the extension .exe and some parameters following after `.
2. Open the properties (by clicking right button of mouse) of Start->Program->MS-DOS prompt and command(.com) or cmd.exe and/or _default.pif in the Windows' system directory.
Examine that the check of "Program->Close window after the end of program" is ON and the check of "Others->When the window is not active->Allways stop procedure" is OFF.
If there are any differences, correct them.
Moreover, set "Others->Priority of other program" lower.
3. Set -Wshow: to ON.
4. Kill the launched program (ex.CTRL+ALT+DEL).