the computer boots up fine, but when i get to the desktop page, there is nothing there, except for a window that is called "my downloads." i can navigate away from the page and get to a desktop page, and all other things in my computer, but there is no desktop background, start bar, side bar, or anything else on my desktop. it happened after i downloaded new updates that it asked me to when i shut it down once. then, when i booted up my computer the next day, it was like this. i even went onto the control panel to see if i can change the settings for my start bar, but the page for that option won't open up.
please help, its been like this for about 3 weeks and i have no idea what to do.