Can you legally resell a software licence? The answer depends heavily on where you are — and an HWID change has a practical role in the process.
The legal picture varies by region
In the EU, a well-known court ruling (the UsedSoft case) established that you can resell a software licence — including a downloaded one — provided the original buyer stops using their copy. In the US the picture is murkier: the first-sale doctrine clearly covers physical copies, but many licence agreements for digital licences explicitly forbid transfer, and practice is inconsistent. Elsewhere, rules range from permissive to simply unregulated.
The one constant: read the licence agreement. If it explicitly allows a transferable licence, you are on solid ground. If it forbids transfer, reselling may breach that agreement.
Where an HWID change fits in
Reselling is a legal question; changing your hardware identifiers is a separate, technical one. Most software pins activation to hardware, so when a licence moves to a new owner's machine it often demands reactivation. Aligning the hardware identifiers can make that transition smooth.
A note on OEM Windows
An OEM Windows licence is a special case — it is generally tied to the motherboard it shipped with and is not meant to move to a different PC. Always check the specific terms before reselling.