This error message may appear in several cases:
1. User Computer was not restarted after installation.
Solution: restart computer after installation Net Control 2 Video Hook Driver and before starting Remote Desktop session.

2. Update: previous version of the software removal was not complete.
Updating the software manually, do not forget to restart the computer after removal of previous version.
Solution: restart the computer and install the software again.

3. 64-bit version of Windows XP used
64-bit versions of Windows XP is not supported (64-bit versions of Windows Vista/2008/7 are supported without any limitations).

4. Windows XP: device installation policy requires Microsoft's digital signature for all installed drivers.
Solution: for Windows XP, click Control Panel -> System, open Hardware tab, click "Driver Signing" button, choose any option, excepting "Block".