This is the full World of Warcraft - The Burning Crusade client and all patches needed up to v.2.2.3 . This is the English - United States language client.
All files are original, directly from Blizzard's own releases. The archives do not contain any hacks, cracks, private server patches, trojans, viruses, treasure chests, fishes, prune juice, spyware or any other illegal shit.
Detailed instructions are included.
Also, a small launcher for Crogge's WoW server is included (separately from the main game). It's one of the most serious WoW servers ever, with over 55k accounts registered (and a rule of 1 account per person) and (at average) over 500 people online. http://www.croggesserver.com/ , it's of course free to play :).
If you do not wish to play on Crogge's server, but on Blizzard's original servers it's fine, just don't install the launcher for crogge's server and run "Launcher.exe" from the WoW directory to update to the latest version.