Don't rely on the computers in the library, whenever its peak time, it gets jam-packed.
Best to go to your faculty's computer area.
For Faculty of Science (Biochemistry, Microbiology, Genetics) Its GO7 or GO8 (Card Access only) Yes, lol science is much more poor-er than Medicine, so we're stuck with Apple PCs).
For Faculty of Medicine (Anatomy, Med people, Pathology, Physiology) you have a damn big room full of PCs on 1st floor Wallace.
Though these rooms are all door-swipe access, so depending upon what courses you take each semester, you'll be granted authorisation to enter these rooms.