Windows users nowadays have a real choice, between two excellent distributions, MiKTeX and TeX Live. TeX Live on windows has only in recent years been a real challenger to the long-established MiKTeX, and even now MiKTeX has features that TeX Live lacks. Both are comprehensive distributions, offering all the established TeX variants (TeX, pdfTeX — both with ε-TeX variants — as well as XeTeX and LuaTeX), together with a wide range of support tools.
Both MiKTeX and TeX Live offer management tools, including the means of keeping an installation “up-to-date”, by reinstalling packages that have been updated on CTAN (the delay between a package update appearing, and it being available to the distribution users) can be as short as a day (and is never very long).
MiKTeX, by Christian Schenk, is the longer-established of the pair, and has a large audience of satisfied users; TeX Live is the dominant distribution in use in the world of Unix-like systems, and so its Windows version may be expected to appeal to those who use both Unix-like and Windows systems. Current releases of MiKTeX require 64bit Windows.
Both distributions may be used in a configuration which involves no installation at all. MiKTeX’s “portable” distribution may be unpacked on a memory stick, and used on any windows computer without making any direct use of the hard drive. The web page TeX Live portable usage describes the options for installing TeX Live on a memory stick, or for using the TeX Live DVD with no installation at all.
Both MiKTeX and TeX Live may be downloaded and installed, package by package, over the net. This is a mammoth undertaking, only to be undertaken by those with a good network connection (and a patient disposition!).
The TeX Collection DVD also provides an offline installer for TeX Live.
A further (free) option is available thanks to the CygWin bundle, which presents a Unix-like environment in Windows systems (and also provides an X-windows server).
BaKoMa TeX, by Basil Malyshev, was a comprehensive (shareware) distribution, which focused on support of Acrobat. The distribution came with a bunch of Type 1 fonts packaged to work with BaKoMa TeX, which further the focus.
FAQ ID: Q-syswindows