Upon updating your Warcraft 3, the following error message is displayed: "Registry error loading key Warcraft III\InstallPath".
As the message indicates, the "InstallPath" (installation path) registry key can't be found.
Open the registry editor
Start> Run > type regedit> Ok
Go to HKEY_CURRENT_USER\Software\Blizzard Entertainment\Warcraft III
InstallPath, InstallPathX, Program and ProgramX keys
Note: If the keys listed below do not exist, you must create them by:
Right click> New> String Value
Under Warcraft III should find the following registry key: InstallPath.
Right click> Edit.
Set the path to the folder of Warcraft III folder: (default) C:\Program Files\Warcraft III
If you have installed The Frozen Throne, you must repeat the operation for InstallPathX.
Under Warcraft III should find the following registry key: Program.
Right click> Edit
Set the path to Warcraft III.exe: C:\Program Files\Warcraft III\Warcraft III.exe.
If you have installed The Frozen Throne, you must change the ProgramX key by putting the path to Frozen Throne.exe: C:\Program Files\Warcraft III\Frozen Throne.exe.
HKEY_CURRENT_USER\Software\Blizzard Entertainment\Warcraft III should look like this (with Frozen throne installed):
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