Hi there Win7 Ult. 64 bit ATI Radeon HD 2400 Intel E8400 Intel X25-M 80GB 4 x Seagate 1.5GB SATA drives. 2 x eSata. 2 x Internal. For some week now my machine just freezes when unattended. Sometimes within 10 minutes. No BSOD. The mouse cursor moves but ‘ click ‘ is dead. The keyboard is dead. Cntrl+Alt+Del doesn’t work. Power ON/OFF required. I’ve had this some 20+ times; no new HW & no ( as far as I’m aware ) new SW. MSE running. CCleaner used regularly. I don’t fiddle with the Registry. I’m thinking its still video related. The screen freezes the current desktop image at the time it crashes. It NEVER happens when I’m using the machine only when I’m away. Win7 not set to sleep or hibernate... 1. I have looked in Event Viewer. I can find nothing ‘ critical ‘ other than my switching the machine off and no related ‘ errors ‘. 2. I look at the ATI HD 2400. There had been problems with earlier drivers and these symptoms – drivers all now updated. 3. No errors on the SSD 4. I’d like to run CHKDSK; think with Win7 this might take a week on 6Gb with the new chkdsk ‘ speed ‘ of Win7 ( thanks M$). I need to up my diagnostic game as I’m still clueless. Advices please. Richard.