Installing DMD
Windows
Easiest and fastest way to get your DMD running on MS Windows is to use DInstaller You can watch instructional video how to do that.
If you'll encounter any problems with missing libraries or non-existing executables, take a look on this.
Debian Linux compatible
If you have distribution that's based on APT package manager, you might use APT Repository.
Arch Linux
There is a package in community repository for 32 bit dmd and | 64 bit dmd.
Other POSIX compliant
You might try looking for precompiled package for your distribution on http://dlang.org/download.html
If it's isn't there you might try [Building_DMD | building from source].