If any, they are degrading the productivity of the employees that are using them. Thereby effecting your bottom line. It would benefit your staff greatly to all be running on solid state hard drives (SSD). They boot and run much faster. Increasing productivity greatly!
If a computer is not over 3 years old, we can clone the image from an existing platter drive over to a SSD in about an hour. When it boots up after, it will have all of the software and settings it had before.