Flashing CMD screen

Computer Type: PC/Desktop
System Manufacturer/Model Number: n/a
OS: Windows 10 Home. 19045.3693 WinVersion 22H2
CPU: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
Motherboard: Gigabyte GA-Z370-HD3
Memory: Crucial 16Gb DDR4
Graphics Card: Nvidia GTX1060 3Gb dual
Sound Card: Nvidia HD audio
Monitor(s) Displays: LG 32" HD TV as monitor
Screen Resolution: 1920 X 1080
Keyboard: Microsoft wireless 850
Mouse: Microsoft wireless 1000
PSU: Corsair VS 550W 80+
Case: Corsair Graphite 230T
Cooling: 3 onboard fans + Coolermaster Hyper 212X heat sink
Hard Drives: Samsung SSD 960 EVO 256Gb Seagate 1Tb HDD WD 1Tb external HDD
Internet Speed: Fair to middlin'
Browser: Firefox
Antivirus: Avast free
Other Info: MBAM Adware Glary utilities

Computer Type: PC/Desktop
System Manufacturer/Model Number: Built by shop
OS: Windows 10 Home 21H2 19044.1826
CPU: Intel Haswell. BX80646174790 Core i7-4790 3.6 GHz 8mb LGA 1150
Motherboard: Gigabyte Model H97-D3H Intel H97 S1150
Memory: G.Skill Sniper 16Gb (8gbx2) DDR3 1600
Graphics Card: Gainward Nvidia GTX770 PCI-E VGA
Sound Card: Realtek
Monitor(s) Displays: Samsung 27" monitor
Screen Resolution: HD
Keyboard: Microsoft
Mouse: Microsoft optical
PSU: Antec HCG-620w High Current Gamer
Case: Thermaltake A41 USB3 Mid Tower
Cooling: Standard Intel with added heat sink
Hard Drives: SSD: Samsung 840 PRO series. 256Gb SATA 3 winw
Internet Speed: OK
Browser: Firefox
Antivirus: MSE