What is a HWID? What is a HWID Lock?
HWID stands for Hardware (HW) Identifier (ID).
This is a unique code generated from various components of your PC.
Most hacks "lock" into your HWID.
It means when the first time you activate your key, your HWID is "saved".
Each time the key is used, it will check if the HWID matches the saved one.
If it matches, the hack will work, if it does not, then the hack will give an error.
THIS IS WHY IT IS IMPORTANT NEVER TO SWITCH PC's OR SHARE YOUR LICENSE KEY!
It is done to prevent people sharing their license key or reselling it after usage it wont work for hacked games anymore.