A lightweight, portable utility. Note that Microsoft Defender may flag it as a "false positive" due to its ability to extract sensitive license data. Belarc Advisor
For PCs that came with Windows pre-installed (like or HP ), the key is often "injected" into the motherboard's BIOS/UEFI. product key finder windows 10 download
If manual methods fail, these third-party tools can scan your system's registry or BIOS to extract the 25-character key in seconds. ShowKeyPlus A lightweight, portable utility