Sorry, I missed that bit.
If after a reboot the wireless adapter needs to be manually started with:
sudo modprobe rt2800usb
then follow the instructions below.
Open a terminal and run:
sudo gedit /etc/modules
when gedit opens a file with some stuff already in it … add a NEW line at the bottom that reads:
rt2800usb
SAVE the file, and exit gedit.
REBOOT to test.
Hint -
Any modules listed in the /etc/modules file will be automagically loaded at boot 