Sometimes the driver file is present but not registered.
Here’s a concise review of the error message : copy protection driver is not installed
When you launched the game, the software would check for the original physical CD/DVD in your disc drive. The SafeDisc driver would scan the disc for "weak sectors"—intentional manufacturing errors that could not be reproduced by consumer CD burners. If the driver didn't find those errors, the game assumed you were using a pirated copy and refused to run. Sometimes the driver file is present but not registered
The error is rarely a sign of a pirated copy; pirates usually strip the copy protection entirely. Instead, this error plagues legitimate users for several reasons, ranging from system updates to security conflicts. copy protection driver is not installed