I'm on Windows 7 Enterprise 64bit. Are there 64-bit executables for Windows? I'm using the proTeXt TeX distribution: http://www.tug.org/protext/
Christian Schenk wrote on the miktex mailing list:
None of the earlier versions of miktex even mentioned 64-bit apps, and protext is definitely based on an earlier version (although I do not know which one) so: No.