Technically speaking a bottleneck cpu or gpu wise would not give stutters íf you have the right drivers installed. Check out your motherboard model and search the support page then download and install the latest drivers. Chipset drivers and ME(intel) drivers. Maybe the latest BIOS update and The latest ME firmware could help too Indeed a clean DDU of your videcard could help and install the latest videocard drivers.

Let’s say you use Windows, that means Windows will butt force you to upgrade it every month or so, so Windows will have had a lot of changes and the old drivers could maybe not keep up.

Very wise of her. Though this is peak capitalism, living in a country to depend on private donations.