TOSHIBA RECOVERY DISC / SATELLITE A135

I HAVE A TOSHIBA SATELLITE A135-S4527 WITH VISTA ULTIMATE.ONCE I TURN IT ON A SCREEN POPS UP AND SAYS YOUR PRODUCT KEY IS INVALID FOR ACTIVATION AND IT GIVES ME 3 OPTIONS 1/ACCESS YOUR COMPTER WITH REDUCED FUNCTIONS 2/TYPE IN A DIFFERENT PRODUCT KEY 3/CONTACT MICROSOFT ONCE I CLICK ON TO 1 IT GOES TO GENUINE MICROSOFT SOFTWARE I BYPASS THAT & CLICK ON FAVORITES TO GET ONLINE
IM ALLOWED TO STAY ONLINE FOR 30 MIN THEN I GET KICKED OUT AND I HAVE TO START OVER AGAIN