Since installing the SP1 I am now having problems with games crashing. These same games have been played using the same cards, drivers etc before installing SP1. I am now on the 21.83 drivers but I have tried every set of drivers apart from the beta ones. Every time I changed the drivers they were clean installs so there was nothing left from a previous installation to conflict. The 21.83 drivers are the ones that were already installed prior to my SP1 installation and have previously caused me no problems whatsoever playing the same games that are now crashing. This rules out the overheating possibility as I have never had any problems at all. The crashes can happen anytime between 5 minutes or an hour or so of playing. i then have to reset the system to reboot. My system specs AMD Athlon 1.4 DDR (PC2100) Asus A7a266 ACPI Bios 1009 512 DDR RAM GeForce 3 Ti500 (21.83 drivers) Soundblaster Audigy (5.12.01.0253 drivers) Direct x 8.1 Windows XP Home Edition (SP1) I did do a backup before installing SP1 but as it has fixed a couple of other problems and is going to be necessary for future upgrades I dont want to uninstall SP1 if I can help it. Any one had similiar problems or any idea what the problem could be?