hi - english please.
connect your Monitor via HDMI or DP (or even DVI)
1. run DDU in Safe-Mode in Safe-Mode
2. reboot
3. install LATEST driver for Vega 8 integrated graphics
4. reboot
5. maybe install screen-driver (if there is one)
6. try to set 1080p for your screen
maybe consider a fresh windows install
PC: R7 2700X @PBO + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS