HI, I have a serious problem with my computer. It is constantly crashing to desktop, often with no error. Some examles Zend Developer Environment - Crashes to desktop, no error, event viewer has nothing for it. Sims 2 - Says the application has cashed, no info given. Need for Speed Pro street / Star Wars Battle Front / Grand prix 3 / AudioSurf Track Man Nations - Just says application has crashed, do you want to send an error message to Microsoft. I have run a mem test but to no avail, I dual boot Windows/Linux and linux runs perfectly with no problem. My Computer Intel P4 519 3066MHz GeCube Radeon HD3850 (ATi) 2gb DDR II RAM 300 Watt PSU <-- Preaps not powerful enough but would that be the cause and if so, why does linux run fine? I am going to try doing a non-destructive system restore which (I think) re-instates windows files without making any changes, but this does cause hassle and I am always paranoid as my recovery cd is a bit dodgy and getting the linux bootloader back is a pain. I would like to know if there is anything I can do first a little less drastic. here is what I have done. Replaced Graphics Card with and old nVidia Ran the linux memtest thingy Checked the temperatures via SpeedFan whilst running games in windwosed mode to check for overheating. Re-installed the programs. Already installed Windows twice (completely) Run CCleaner. Removed all garbage from add/remove. Any help would be great, I will post more info as I get it.