fortnite problems

i have a a ryzen 5 3600 with and 1650 and 16gb of ram and cv 550 power supply,240gb ssd m.2,stock cooler and 4 fans and and msi b450m pro max when i play fortnite it lags but feels smooth so the builds are delayed but when you build it dont feel clunky and i checked my threads on task manager...

I go in to a game and then get kicked on fortnite and it says corrupted memory #0 battle eye error. can you you help me ASAP PLEASE.