The below procedure to let you run currently when use non-administrator accout. 1.Place winio.dll, winio.vxd and winio.sys in the directory where your application resides. 2.Log on as an administrator. 3.Run "Install.exe" then click "Install Driver". 4.Reboot the system. 5.Log on as a regular user. 6.You should now be able to use WinIo in the same way as when using the library from an administrative account. 7.When WinIo is no longer required, call RemoveWinIoDriver to remove the WinIo driver from the system. This must be performed from an administrative account.