An HWID ban (from hardware ID, an "identifier of the hardware") is a punishment applied to a computer rather than to a user account. Players also call it a "hardware ban" or simply "an HWID."
Where the fingerprint comes from
An ordinary ban is tied to an account: break the rules and you lose the profile. But a new account can be created in a few minutes, so for cheaters this kind of punishment costs almost nothing. To make repeat violations more expensive, developers and anti-cheat makers (anti-cheats are programs that look for prohibited software and suspicious behavior) learned to recognize the computer itself.
To do this, a set of hardware characteristics is collected: serial numbers and identifiers of individual components, such as the motherboard, the storage drive, or the network card. Together they form a unique fingerprint. If that fingerprint ends up on a blacklist, logging in from that computer is prohibited, and a new account on it is immediately blocked or cannot launch the game.
How it differs from an ordinary ban
- An account ban hits the profile: progress, in-game items, and rank are lost. It can be bypassed by registering anew.
- An HWID ban hits the machine: the profile can be anything, but the hardware remains "marked."
Such a block is bypassed by replacing the components that make up the fingerprint, or with special programs that spoof the identifiers. The second method itself violates the rules of most games and platforms and often leads to further bans.
Why it's worth knowing about
The mechanism has a weak spot: the fingerprint knows serial numbers, but it does not know who is sitting at the computer. So, in theory, a person who did nothing wrong can end up blocked, for example someone who bought used components from an owner who had been punished earlier. How often this happens and how such blocks are lifted depends on the specific game or anti-cheat, and there is no single rule. Usually the decision is made by support in response to the player's request.
Hence the practical takeaway for those who buy components secondhand: ask the seller whether they were ever used for prohibited software, and keep proof of purchase, which will come in handy if you have to contact support.
The term itself is not used only in games. Hardware identifiers are also used for software licensing and fraud protection, but in the gaming scene an HWID ban almost always means specifically the blocking of a rule-breaker.