Right-click the file. Select "Run as Administrator." 3. Disable Security Software Temporarily
Run the installer. Turn your protection back on immediately afterward. 5. Disable Core Isolation (Memory Integrity)
Sometimes the installer fails but the driver files can be installed manually.
Download the official utility from the Thales support site. Right-click the file
If you are installing version 7.5.7 on a modern operating system like Windows 10 or Windows 11, compatibility issues may cause the installer to crash. Right-click the installer file and select . Navigate to the Compatibility tab.
Keep it unplugged until the installation process is completely finished. 2. Run the Installer with Administrator Privileges
Before diving into the solutions, it helps to understand why the installer is crashing or rolling back. The most common culprits include: Turn your protection back on immediately afterward
The installer frequently fails if it detects the hardware it is trying to configure.
Right-click the Sentinel System Driver Installer 7.5.7.exe file. Select .
Run the installer. Turn your services and antivirus back on immediately afterward. 5. Upgrade to a Newer Driver Version Download the official utility from the Thales support site
Check the box at the bottom for . Click Apply , then OK , and launch the installer again. 3. Completely Purge Legacy Driver Remnants
Since the release of Windows 10 and 11 64-bit, Microsoft requires all kernel-mode drivers to have a valid WHQL (Windows Hardware Quality Labs) digital signature. The Sentinel 7.5.7 driver, depending on its build date, may lack this signature or have an expired certificate, leading to an immediate block on installation.