更新纯 TeX、纯 pdf-TeX、e-TeX、pdf e-TeX 和 xetex 格式失败。只有排除这些格式后才能更新其他格式。如果我主要使用 pdfLaTeX 或 LaTeX2e，我需要这些格式吗？错误：
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Creating the etex format file...
Running miktex-pdftex.exe...
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (MiKTeX 2.9.6200) (INITEX)
entering extended mode
("C:/Program Files/MiKTeX 2.9/tex/plain/config/etex.ini"
Preloading the plain format: codes, registers, parameters, fonts, more fonts,
macros, math definitions, output routines, hyphenation
! I can't find file `hyphen'.
l.1222 \input hyphen
Please type another input file name
! Emergency stop.
l.1222 \input hyphen
No pages of output.
Transcript written on etex.log.
Sorry, but miktex-makefmt did not succeed for the following reason:
miktex-pdftex.exe failed on etex.ini.
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