SEVERE PROBLEM: Windows 10 Home Edition Doesn't Have Anti-Virus?????

Computer Type: PC/Desktop
System Manufacturer/Model Number: Dell Vostro 270s (2016)
OS: Windows 11 [21H2]
CPU: Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz, 3.1 Ghz, 2 Core(s), 4 Logical Processor(s)
Motherboard: Dell Inc. 0XFWHV
Memory: 4GB DDR3
Graphics Card: Intel HD Graphics
Sound Card: Realtek HD Audio
Monitor(s) Displays: HP Compaq LA2006x
Screen Resolution: 1600x900
Keyboard: standard keyboard
Mouse: standard mouse
PSU: -----OEM-----
Case: -----OEM-----
Hard Drives: Patriot Burst 240GB SATA III SSD, SAMSUNG HD250HJ (broken, disconnected)
Internet Speed: 50MBits/s
Browser: Chrome, Edge Beta
Antivirus: Windows Defender
Other Info: Out of warranty (as I suppose to an second-hand system) | Some of that is from msinfo32.exe | Now fixed, but the technician installed an custom Windows install and added KMS shenanigans. Removed the KMS thing and changed it to an valid Win10 license. Clean Installed to Windows 11.

Computer Type: PC/Desktop
System Manufacturer/Model Number: VM
OS: Windows 3.1.1, 95, 98SE, 2000 / MS-DOS 6.22
Memory: 64-256 MB
Graphics Card: VM Graphics adapter
Sound Card: Soundblaster Pro
Monitor(s) Displays: Generic Monitor
Screen Resolution: 1600x1800
Hard Drives: VM HDD
Browser: Seamonkey 1.1.19
Other Info: VMware Workstation Player 16 | THIS IS A VIRTUAL MACHINE.