If you purchased the device second-hand, the previous owner can remotely remove the lock by signing into iCloud.com , going to "Find Devices," and selecting "Remove from Account".
If you simply forgot your credentials, try to reset your password through the official Apple ID recovery page. If your Apple Account is locked, not active or disabled If you purchased the device second-hand, the previous
Many "free download" links for tools like HaaFedk are hosted on unverified third-party sites and may contain malware, viruses, or spyware . If you purchased the device second-hand