When Microsoft released Windows 10 (and subsequently Windows 11), they permanently disabled and blocked the secdrv.sys driver used by SafeDisc. Microsoft determined that the low-level kernel driver represented a severe security vulnerability that could be exploited by malicious software.
If you upload a clean copy of the original sd4hideexe to a multi-scanner platform like VirusTotal, you will likely see that 30-50% of antivirus engines flag it. Standard detections include: sd4hideexe