Suddenly the Restart option on my PC has stopped functioning. After logging off and shutting down, the PC starts the process of restarting but gets stuck on the welcome screen of the motherboard. I can see the light showing had disk drive activity but no further progress takes place. I have to then forcibly stop the PC by pressing the start button long. After the PC stops, I can start it notmally by pressing the start button again and then it starts normally. Whether the restart option is used mouse Start/Restart or clicking on the <Restart Now> option after updates, the problem is the same. I have checked all options in BIOS and Googled it but there has been no solution. I am using Windows 7 Ultimate 32-bit and Intel Core Duo 2.66 GHz CPU.