I tried to do those things that u said me but I can't boot I can't do those things. When I put the DVD in DVD-reader and boot computer, there will be no option for booting from CD. Windows just runs normaly and ends up with the wallpaper and cursor.
Infact, the reason why I am trying to format my computer is that I can't do anything. I hope that formatting could get me away from this problem, but I can't even do it. I found some webpages that ppl have had same kind of problem, but they didn't give me an answer.
Like this: Boot up to blank desktop
or this: Windows Boots to a blank desktop or wallpaper
or this: Computer boots to a black screen w/mouse pntr
And when I try to run the windows in safe mode, it just freezes to the black screen in which I can only move a cursor. Ctrl + alt + delete or windows button + r don't work.
EDIT: And I can't even manage to get in that point where you need to write your password to log in the windows account.