Thank you for all the advice. I actually already have a new PC (i5 8400 core on ASUS Prime H310-E motherboard). Guess I was kinda hoping to "breathe" some life back into the old timer instead of just retiring it completely. Many thanks, again!
What upgrade do I need on my old PC with an Intel Core 2 Duo CPU E7200, ASUS PSGC-MX/1333 (LGA 775) motherboard and 2GB Single-channel DDR2 RAM to smoothly run Windows 10 and MS Office Home & Student 2016? It does not have a dedicated graphics card.