Can anyone help us?

We have installed Sky Anytime, tried to log in, and get the error message 15, advising us to follow the link to update windows. We have downloaded the update succesfully, restarted the PC, but still get the same error message when we try to log in. We have also uninstalled Sky Anytime, rebooted, and reinstalled Sky Anytime, after updating from Windows.

Thank you!