I have an HP pavilion ze4800 that runs on an Athlon XP-M Processor with Windows XP SP 2. I downloaded an alleged Active X update yesterday and the computer crashed a few minutes later. I kept getting the blue screen. I ran a few times in safe mode today, but it crashes once I open an application. The blue screen gives an error that "A driver has overrun a stack-based buffer. This overrun could potentially allow a malicious user to gain control of this machine." Any advice would be greatly appreciated. Thanks.