The UnregisterDeviceNotification function is included in Windows 98 and later systems, including Windows Me, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows Server 2012 and Windows 10. On Windows 95 and Windows NT 4.0 the above error message is displayed when WinUAE.exe tries to use this feature.
The version of WinUAE.exe which had this problem was included in some versions of Amiga Forever 5.0. To solve the problem install the free upgrade to Amiga Forever 5.1, or a newer version.
Amiga Forever 2008 and higher do not support versions of Windows prior to Windows 2000.