Run Atmel Studio
Go to Tools - Extension Manager - Online Gallery
Select Wireless Composer, click Download, and then install it
Click Restart Now button in the Extension manager window
Windows® XP pops up a "Run As" message box before help installation and ask user to select the user account to run the help installation program. Pressing "OK" in this message box makes help installation failure. In that message box, there is an option to "protect my computer and data from unauthorized program activity". By default this is selected, deselect this option.