Click onStartbutton > (your username) >Desktopfolder.
Right punch theDesktop folderand clickSend to->Desktop (Create Shortcut).
This will create a desktop shortcut to open desktop folder.
Right click thekeyboard shortcut for desktopyou have created just now and clickProperties.
OpenShortcuts taband click onShortcut Key box.
Now clickALT + CTRL + any letter keyto create a custom shortcut and click OK.
I usually useALT + CTRL + Dto open desktop folder andWin + Dto show desktop.