Now launch the game. Ubisoft Connect should pop up, authenticate silently, and the game will start. Sometimes, the game believes the old launcher is installed but "broken." We need to trick Windows into thinking it was never there.
For players on brand new Windows 11 or Windows 12 machines in 2026, this error has become the final boss. The game itself isn't the problem—the skeleton of outdated DRM (Digital Rights Management) is. This article will explain why this happens on new systems and provide the definitive, step-by-step solutions to get the Prince climbing walls again. To understand the fix, you must understand the history. When Prince of Persia: The Forgotten Sands launched in May 2010, Ubisoft was deeply invested in a controversial online-only DRM system. The game required a separate piece of software—the Ubisoft Game Launcher (now evolved into Ubisoft Connect )—to verify your license even for single-player mode. Now launch the game
Right-click the main game executable ( PrinceOfPersia.exe ) and select Properties > Compatibility > Check "Run this program as an administrator" . Click OK. For players on brand new Windows 11 or
It is a scenario that has frustrated countless fans of the Melee Platformer genre. You’ve just reinstalled Prince of Persia: The Forgotten Sands . Perhaps you’re revisiting the 2010 classic for its tenth (or fifteenth) anniversary, or maybe you’re a newcomer trying to see how the Sands of Time trilogy’s "spiritual cousin" holds up. You click "Play" on Steam, Epic, or directly from the desktop shortcut. The cursor spins for a moment. Then, instead of the majestic orchestral score or the sight of the Soloman’s Fortress, you are met with a cold, brutal dialog box: To understand the fix, you must understand the history
Fix the error, disable the DRM, and enjoy the climb. The sands have not run out yet.
If you haven't already, download and install the latest Ubisoft Connect from the official Ubisoft website. Log in with the account where you own the game. Do not launch the game yet.