At start up, after loading Windows, my PC now displays the message: "RPS. The paramter is incorrect". At the same time the PC Guard advisor panel gets stuck in "loading services" mode. I can get around this by restoring to a previous point, although this doesn't solve the problem it just skirts around it. Today, having restored, I also got this message: "An unexpected error has occurred that this application cannot recover from. Exception code - 3221225477; exception address - 7C918FEA" Any insights will be appreciated.