Open the extracted folder and run the setup.exe file as an administrator.

Ensure you have all required parts (Part 1, Part 2, etc.) in the same folder.

GRID from Apun Ka Games:

Right-click on Part 1 and select "Extract Here" using WinRAR or 7-Zip. It will automatically combine the other parts.

If prompted for a password, it is typically www.apunkagames.net .