After opening my laptop, all works great. But after 2 to 3 minutes. task bar and the charm bar doesnt respond. all applications work like, antivirus, media player, and windows explorer. i cant click on my task bar and the icons pinned in it. magic happens when i pressed window key, it opens the charm bar but suddenly disappears and restarts the desktop. i tried to disable some startup applications and boot services, but nothing happened. please help, i need it for my business.