Desktop disapeared how do i restore?

I don't know what the hell is going on! So i'm just doing the usual, (watching youtube videos & scrolling down my tumblr feed) and i minimized the google chrome and BOOM i have no start menu and my desktop is gone! How do i restore my desktop! My background picture is there but the start menu is gone (the bar on the bottom that had a start menu & the time and stuff) yeah its gone & all my things i had on my desktop is gone (i had a minecraft folder, microsoft works, googlechrome etc)!
I have windows 7 laptop btw
Please if anyone knows how to help please do!

You will need to launch explorer.exe it crashed and now you don't see it (taskbar, icons on desktop). To do so:

1-hold ctrl+shift+esc "task manager" will open up.
2-at the top left click on "file", then "new task(run)"
3-a blank box opens, in in you type: explorer.exe
4-you should be all set instany everything back to normal