How can I increase my fps in League of Legends?

keeping your drives up to date, can help.

i can try clean ur pc dust then install lates drivers if dont help u can google or find on youtube how to increase max performence on pc ofc can change power suplay for max performance mode and change Control Panel\System and Security\System > advance system settings > performance settings > and uncheck everything or just click on ajust for max performance

clean up ram slot & mainboard ). i think it about your pc is so dusty, besides league when in game, if that do not work then just buy a new pc lol .

looking for how to improve the performance in win10 and play in the lowest possible resolution, although this can be very disruptive.