ok so right off the start, i play on igpu, so not really a high end pc so i mostly run cloud gaming, but certain games that do run on 720p, i play them natively on my pc instead of cloud gaming. So i have 3 steam games (batman arkham origins, city and shadow of war) and 3 epic games (darkwoods, fallout 3 and nv) installed on my pc. I havent really played any of those steam ganes on my pc for last 2 months or so, but ive been playing the fallout series games almost daily. Today i decided to play some of the steam ganes i got and suddenly all of them started lagging like hell, my epic games run just fine for me btw, but all of the steam games that i havebt played for last 2 months started lagging like hell. The epic store games r running just fine for me without any issues though, what is the problem? and how to solve it? any help pls. Btw the only changes i made to my pc in last 2 months are, 1. i have installed 2 new games and uninstalled 5 games 2. ms office 365 was bugging so i installed and fixed it and then i uninstalled it too

Thats all i did in last 2 months, idk why this is happening