This is a simple ducky script I wrote that will clear your google chrome history and automatically log you off tested on windows 7 (Windows 8-10 requires modification because of start menu.) This payload is useful for when run/GUI + R is blocked
DELAY 1000
CTRL + H
DELAY 750
DELETE
DELAY 2000
CTRL + W
DELAY 750
GUI
DELAY 100
TAB
DELAY 100
TAB
DELAY 100
ENTER
You may want to increase the delays as most library computers can be slower than the average machine.