I was sitting on an exam where we were allowed (although not mandatory) to use a computer to research and write the exam and halfway through reading the exam sh

I was sitting on an exam where we were allowed (although not mandatory) to use a computer to research and write the exam and halfway through reading the exam sheets I noticed my colleague's computer restarts and enters the windows 10 installation mode. It finished half way through our exam time. His computer was useless to him for the exam. This is shameful Microsoft.