Com ports are different to usb ports. What do you have listed under USB or Universal Serial Bus ? Should be at least one hub and one controller. If nothing is there, it is likely that they got turned off in the computer setup (bios). Re-enable them and they will reinstall themselves. If they are enabled in bios, then it's possible they went faulty. If you have reformatted, then if they were simply uninstalled, they would have been reinstalled.

Welcome to Windrivers Rufus.