Search for "Tiny10 32-bit 2024" or "Windows 10 Superlite x86." Always scan custom ISOs with VirusTotal before installing.
Enter BIOS (F2/DEL). Enable Legacy Boot, disable anything "Secure Boot" or "UEFI." Set your HDD to IDE mode (not AHCI) for older Windows compatibility. Windows 10 Lite 32-bit 512 Ram
For a machine with only 512MB of RAM, you will generally have a much better experience using: Search for "Tiny10 32-bit 2024" or "Windows 10 Superlite x86