Is it possible to upgrade a budget/refurbished computer at a later date? I have a $500 hard budget for a new PC and I am wondering if I buy one now if I can upgrade it at a later date. Computer will primarily be used for a very small side bookkeeping business (using QuickBooks....only one client currently) and will also be used for some internet surfing (shopping etc). My son plays Fortnite and would also like to use it for this but also has PS4 and iPad so performance for gaming is low on the priority list. If it is possible to upgrade, what should I be looking for in the computer I will be purchasing now? Thanks in advance!