Many years ago I used to provide a service to disinfect virus-ridden computers.
My personal best for a single computer in a single company was just over 1,000 viruses.
At the offices of this company, when I discovered the state of it I told the computer's user (the MD's secretary) that it would take a while to get rid of all the viruses, and, as there would be a lot of waiting around for scans, it would be easiest if I took it back to my office to do it there. It wasn't usable as it was anyway. She said fine, so I took it and started work.
Some hours later an irate Managing Director was on the 'phone saying I must take the computer back to their offices immediately.
I took the lack of any explanation to mean that there was something on there that the MD didn't want me to see.
I took it back, still riddled with viruses, and I never heard from them again.
It's (still) a physical security company in Sutton-in-Ashfield, Nottinghamshire.
They still advertise "First Class Security...", which kinda sums it all up for me.
Struggling nowadays to find *anything* that isn't built on lies.