All the computers in our libraries are run by ITS and they are responsible for reviewing and making changes to PC provision. You can get in touch with them via the IT service desk (
http://www.dur.ac.uk/its/servicedesk/contactus/) to give them feedback. If you get in touch with ITS be specific about the locations and times you are unable to access a PC.
If the computer room you usually go to is full you can check how many PCs are currently free on the ITS website
Durham:
http://www.dur.ac.uk/its/classrooms/freeplaces/durham/Queen's:
http://www.dur.ac.uk/its/classrooms/freeplaces/queens/