What an HWID ban is and how a spoofer works
An HWID ban hits your hardware, not just your account. Here is how games tie a ban to your PC and when a spoofer actually helps.
A regular ban blocks an account: make a new one and you are back in. An HWID ban works differently — it attaches to the computer itself, so a fresh account on the same machine is blocked immediately. Let us look at how it works and what spoofers do about it.
What HWID is
HWID (Hardware ID) is a set of identifiers of your hardware: the motherboard, drives, network card, sometimes the GPU and other components. The anti-cheat combines them into a unique "fingerprint" of your PC.
When a game issues an HWID ban it remembers that fingerprint. After that it no longer matters how many new accounts you create — on launch the system recognises the device and blocks access again.
How a spoofer works
A spoofer (HWID spoofer) is a tool that substitutes those hardware identifiers so the anti-cheat sees a different fingerprint. The computer is physically the same, but to the game it looks like a "new" device with no link to the previous ban.
A spoofer does not unban an already-banned account — it lets you get back in on a clean account after an HWID ban and reduces the link between accounts. It is usually run before the game starts, and some spoofers require a reboot.