77 temp looks high. [font=verdana, geneva, lucida,]Pls also tell if you have tried to OC your PC in recent past or.....? [/font]But check it out with Everest and post the data here. Meanwhile, clean the dust, arrange the cables for proper air flow, check if [font=verdana, geneva, lucida,]heatsink isn't installed correctly or you have too much or too little thermal paste contact between the heatsink and CPU, your fan is working correctly or is properly connected to the mobo.[/font]