so, it all started when i bought a gt 730 to put it on my PC cause i had a geforce 8400gs and i heard the gt 730 is better so that's why i bought it. it all started when trying to play some roblox games:

sonic universe rp: that game worked on my geforce 8400gs but now with my gt 730 everytime i try to join it the game just crashes and my pc gets a black screen and i have to restart it.

sonic speed simulator: that game ran smoothly on my geforce 8400gs but now when i click the play button it just crashes instantly and i gotta restart my pc too.

sonic mobius megadrive: that game was literally the smoothest one that could run on my pc but after i bought the gt 730 it just crashes and the app closes instantly.

my friend @LeashedSkies told me to download "bloxstrap" which is a roblox fps booster. (i think)

after i downloaded bloxstrap, those games stopped working:

sodor ta-go railway: it runned smoother on my gt 730 instead of the geforce 8400gs but after bloxstrap the game doesn't even opens and it closes instantly.

cool beans railway 3: that was literally the smoothest game that could run in my gt 730 but after bloxstrap, it just opens and black screens my pc and i gotta restart it.

is there a way i can fix those bugs/error/glitches?