Secure Boot can block drivers without proper Microsoft certification. If you are comfortable with BIOS changes:
October 2023 Difficulty Level: Moderate Applies to: Daemon Tools Ultra (Versions 4.x, 5.x, and 6.x) daemon tools ultra sign check error fix
| Cause | Explanation | |-------|-------------| | | Windows Update or antivirus software revokes old signatures | | Corrupted installation | Incomplete install or registry conflicts | | Antivirus interference | Security software quarantines driver files | | Windows Driver Signature Enforcement | Windows blocks unsigned or modified drivers | | Leftover files from previous versions | Conflicts between old and new DT Ultra components | Secure Boot can block drivers without proper Microsoft