Fixing the p1c1394_ws03_x64.sys or "Incompatible Driver" Error on Windows 10/11

If you receive an "incompatible driver" error while installing Capture One on Windows 10 or 11, it’s likely caused by an old Phase One driver left over from a previous installation.

How to Remove the Driver

1. Open File Explorer and go to:

C:\Windows\System32\DriverStore\FileRepository

2. Delete the folder starting with p1c1394.inf_amd64.

This driver is no longer needed and may block installation. Once deleted, you should be able to continue installing or activating Capture One.

Optional: Remove via Command Line

If you prefer using the command line:

1. Open Command Prompt as Administrator.
2. Run the following to list drivers:

   pnputil.exe -e

3. Find the entry for p1c1394.inf and note the OEM number (e.g., oem18.inf).
4. Remove it with:

   pnputil.exe -d oem18.inf

   (Replace 18 with your actual number.)