You just installed a new toner two days ago and now your office printer is making a grinding noise. What is the BEST course of action in this situation?

Try the simple things first while troubleshooting. If the grinding started after you put a new toner cartridge, the toner cartridge is probably to blame. Replace it with a new one. If that doesn't work, check for paper jams and loose rollers or gears. The next step would be to thoroughly clean it. Reloading the paper most likely won't help.