Whenever I start up my laptop I get to where I put my password in, Windows loads up but then freezes. The taskbar does not show and I am unable to get the taskbar up by pressing the windows button next to alt. The only thing that loads up is my documents folder?. In order to get the taskbar up I have to press ctrl, alt, delete and choose task manager and then choose new task and type in explorer. The taskbar then loads up. While this is a fix I want to know what is causing this. I have done a virus scan but there is nothing in that. Please help.