: Windows Defender or third-party antivirus (like Norton or Avast) often flags Unlock Tool as a "false positive" and blocks its connection. Temporarily disable Real-time protection or add the tool's folder to your Exclusions list.
Request a refund if you paid for the tool. Otherwise, find an alternative tool with active support. Check forums like XDA Developers or Reddit for current recommendations. unlock tool invalid username or password or server timeout