If you already own a copy of Warcraft 2: Tides of Darkness and have not yet upgraded it, then you may want to do that now. The most recent version of Warcraft 2 is v1.2, which fixes an exorcism bug and some system-specific issues, adds color randomization for multiplayer games, and includes a Kali patch for improved Internet performance.
The following patch is linked to Blizzard's web site at www.blizzard.com.
Warcraft 2: Tides of Darkness v1.2 patch - 506Kb.