Question Slow Alt Tab + Crash

[iShoTz]

When I Alt Tab in Fortnite game, it takes like 5 seconds to alt tab, and sometimes it crashes, is there anyway to fix it? I tried on GTA V, it alt tabs instantly, I played both on Fullscreen. also I have a 144hz 1080p monitor.

Windows 10 Pro 1709

 

[rgd1101]

full system spec? include make and model of the psu

 

[iShoTz]

full system spec? include make and model of the psu

Gpu: RX 570
Cpu: Pentium G4560
8GB Ram ddr4 2400mhz
psu :corsair cx 450w