Log on to the computer as Administrator.
Disable WinRT.
Open the Control Panels folder and double-click Devices.
Select WinRT from the list (abort this step if WinRT is not listed).
Click Startup and click the Disabled radio button.
Click OK and close the Devices window.
Reboot the computer.
Remove WinRT. To do this you must know the location of the systemroot folder. This is on the boot drive and likely is called "C:\Winnt," but may be called something else depending on your installation.
Open systemroot\system32\drivers\
Delete the file named WinRT.sys (abort this step if WinRT.sys is not present)
Use the Run command in the START menu to run regedit
Navigate the registry tree to
HKEY_LOCAL_MACHINE→System→CurrentControlSet→Services→WinRT
Delete the WinRT folder.
Close regedit.
Proceed to the 4pi FPXDriver installation procedure appropriate for your operating system.
Disable WinRT.
Open the Control Panels folder and double-click System.
Click the Device Manager tab and view by type.
Expand the WinRT device category (abort this step if WinRT is not listed).
Select the SEII PCI device driver, click remove, and confirm.
The WinRT device category will disappear.
Close the System Properties window.
Reboot the computer.
Remove WinRT. To do this you must know the location of the systemroot folder. This is on the boot drive and should be called "C:\Windows," but may be called something else depending on your installation.
Open systemroot\system\
Delete the wrtdev0.vxd file.
Open the systemroot\inf\Other folder and locate the 4pi .inf file. It should have the string "4pi" in its filename and likely will end with "FPXDRVR.INF." When this .inf file pertaining to 4pi is found, delete it.
Use the Run command in the START menu to run regedit
Navigate the registry tree to
HKEY_LOCAL_MACHINE→System→CurrentControlSet→Services→Class→WinRT
Delete the WinRT folder.
Close regedit.
Proceed to the 4pi FPXDriver installation procedure appropriate for your operating system.