Okay. So everytime I sign into my computer, the taskbar shows up for about 20 seconds, but then disappears. I also have no start menu. I've tried typing explorer.exe into 'run,' and that doesn't work. I've tried right clicking the toolbar when I first sign on and that doesn't work. And I've gone to control panel and tried unchecking "auto-hide" but it turns out it wasn't even hidden in the first place. What do I do?