How to fix Warcraft 3 Registry Error | InstallPath Error

I see a lot of players saying that they can not install Warcraft 1.24d patch due to the Registry error loading key 'Warcraft III\InstallPath' Error. This error occurs when you don't have original copy of Warcraft or you don't have registry entries created for Warcraft 3. You can make your registry entries manually by using Windows Registry Editor!.How to make Warcraft 3 Registry