For the few days my com. started failing to fail and then dthe problem disapeared and thereafter it could boot normally but afew minuts its goes off by it self and cann’t restart by using the restart button unless you put the power off and then put on. Mostly the problem also occurs when you try to maximize a window or minimize it goes off immediately.It was displying some error that i increase the registry size and did that and the error was gone.Please advice me what could be the problem or how can I rectify that part?