RecNet - double check the provided MAC address versus the actual MAC address
Self-Service - make sure specific sections have been scheduled before registering
Colleague - make sure the user is either on campus with a wired network connection or using Westminster Anywhere, make sure they have the correct access
WiFi - forget all Westminster related networks then reconnect to "Westminster", specific settings for Androids and Chromebooks (listed under KB articles)
Review knowledge-based (KB) articles provided by IS