UnZip, Win32

Install

start ftp://ftp.info-zip.org/pub/infozip/win32/unz600xn.exe

unz600xn -d unzip

cd unzip

move unzip.exe c:/dropbox/bin

Notes:
You can download from SourceForge as well with wget.

References:
ftp.info-zip.org/pub/infozip/win32
info-zip.org/UnZip.html