Go to forest 1 and work your way to forest 2. In forest 2 follow the path to the switch (red circle) and push it to raise the bridge (grey rectangle) to the computer. Then go and to the computer (blue square). As you start to leave the bridge she will stop you and tell you your job is done. Take the pipe and go to the Hunters Guild to finish your quest.

Check here for enemy counts.
Check here for quest experience counts.