When I worked in a factory doing maintenance, I used to occasionally use an office computer to check my bank balance, or sometimes to look up manufacturer’s instructions and data sheets.
One day as I went to use a computer, I was told I was no longer allowed to.
I quizzed the Managing Director and was told it was because of all the viruses they’d been getting.
I was still allowed to install and set up PCs and network printers and of course to sort out any problems the authorised users were having.