For problems with makel2h; is perl.exe in the bin subfolder of the perl folder on the C: drive? Is ghostscript's gswin32c.exe in a subfolder of the gs folder on the C: drive? If you have ghostscript or Perl installed elsewhere, either reinstall them or follow the manual configuration procedure on the web page.
Otherwise this installation is not supposed to fail unless you do something like logging in without administrative privileges or your disk is full/broke. If you cannot figure it out, contact me at l2h@dommelen.net with info what is wrong and what error messages have shown up. Make sure to note that you used the emTeX script.
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