Windows 11 rejects unsigned drivers from most cloned Autocom interfaces (PID 0403, VID 14B0). The legacy FTD2XX.dll and autocom.sys are not signed with SHA-256.
Install Drivers in Test Mode
Run Installer as Administrator
Apply Patches (for non-original units)
Configure COM Port
Because you need to install the old USB drivers, you must boot Windows 11 into a special mode.
Do it if:
Don't do it if:
The final workaround: Use a Windows 11 Virtual Machine (VMware Workstation 17 or VirtualBox 7) with USB passthrough. Install Windows 7 inside the VM, install Delphi Autocom there, and run it seamlessly on your Windows 11 desktop. This virtualized approach isolates the legacy drivers and prevents them from crashing your host OS. Delphi Autocom Windows 11
Final verdict: Delphi Autocom can run on Windows 11, but it requires the patience of a saint and the security awareness of a sysadmin. Proceed with backups enabled.
--- This guide is for educational and diagnostic support purposes. Always use licensed software and hardware where applicable.
While most modern software is 64-bit, the Autocom hardware interface relies on legacy 32-bit kernel-mode drivers. Windows 11 still supports these, but only if Secure Boot and Memory Integrity (Core Isolation) are disabled. By default, Windows 11 blocks unsigned or legacy drivers outright.
Performance comparison:
Verdict: If your Windows 10 machine works, do not upgrade. If you have a new laptop with an Intel 12th/13th/14th Gen CPU that requires Windows 11 (due to thread director), then Windows 11 is acceptable with the tweaks above.
Do not install the Delphi application yet. The hardware must be recognized first.
After installation, the device should appear as Delphi Autocom CDP under "Universal Serial Bus devices."