for offline use. To play offline with the modern client, you typically need to:

Let me know: What Operating System are you using?

: Native support and improved stability for Windows 7, 8.1, and 10. Windowed Modes

Avoid placing the files in Program Files to prevent Windows permission issues. A folder like C:\Games\StarCraft is best.

Only use installers you have rights to (original purchase or legitimately provided). Avoid pirated copies.

If you have original discs, patch 1.16.1 or 1.17.0 are the last versions available as true standalone offline patch files. Key Features of Patch 1.18 StarCraft: Brood War Patch 1.18 Patch Notes - Blizzard News