Hello, Pretty much on a daily basis the keyboard & mouse on my Dell PC stop responding. I have left the PC on for over 10 minutes but still no response so I have to power on / off. Keyboard / mouse then work fine. I did have 2 mice attached to the PC but I have now removed one to see if this makes any difference. CPU temperatures are 51C & 48C - dont know whether this is normal or high? OS is Windows 7. Adrian