The last few days, when I get Windows out of hibernate, Windows itself gets unresponsive. I can use any of my programs that were already opened before hibernating, but the window functions (closing, changing the size etc) aren't reacting. I can't open any new programs, except for the Task Manager.

Also, I don't get an Internet connection. When I use Ctrl + Alt + Del, I get either a black screen, or the regular background. Then it hangs and after a while shows me a message that Windows failed starting up that "thing"(don't know what it's called in English, something with safety, etc).

I have Windows 7 Ultimate installed.