NUI Galway has said additional software will have to be installed on the university's IT systems as part of an ongoing effort to deal with a cyber attack.
Internet traffic into and out of the college network has been disabled since the middle of last week, after the initial threat was detected.
The disruption has led to growing frustration among staff and students.
In an update this evening, university president Ciarán Ó hOgartaigh said that "the first phase of recovery" would entail rebuilding the IT system and restoring data from back-ups.
Further checks will then be carried out before normal service can be resumed.
There is still no timeframe for how long it will take to progress this work.
In an effort to prevent future attacks, "threat monitoring software" will be installed to run alongside anti-virus programmes.
A temporary WiFi system has been installed on parts of the campus, to enable students access to email and Blackboard, an online teaching tool.