Jean, have you tried disabling the "Automatically restart" setting in the "Startup & Recovery"? Goto > Control Panal > System > Advanced > Settings... which is under "Startup & Recovery". If "Automatically restart" is checked then uncheck it. Since my friend told me about this I have not had any more reboots or crashing to desktop. As always you wanna make sure all your hardware is updated & you have the latest DirectX. I hope this helps!
