My Windows Vista was always coming up with an "Error 42" message... After Googling for help, "Regservo" came up to solve the problem... Well, it was NO HELP at all... Still got the message on every reboot... So I immediately sent several emails to "Regservo" asking for a refund and after many months I'm still waiting... What a SCAM! PLEASE, STAY AWAY FROM THIS PRODUCT!