If an old device works, it is not necessarily safe
Sometimes it can seem that any (even old) device that is functional is suitable for the job. However, this assumption is often wrong.
If you're looking to buy new computers for your workplace, CIT recommends the Lenovo ThinkCentre M75 q Gen 2 + TIO4 LCD 23.8" from our central list, which is cheaper than a PC with a monitor, more economical, and has a built-in camera and speaker and microphone. The device is offered without a DVD drive.
Details about the computer can be found in INET.