The process of downloading the Compaq 421 Notebook ATI VGA Driver 8.743.2.3-100813A-103798C for XP driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Compaq 421 Notebook ATI VGA Driver 8.743.2.3-100813A-103798C for XP driver from the primary server - this is the manufacturer’s ATI official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Compaq 421 Notebook ATI VGA Driver 8.743.2.3-100813A-103798C for XP diver.