Manually Disable NTLM v1 on Your Windows PC


Manually use the registry:

  1. Open regedit.exe
  2. Navigate to HKLM\System\CurrentControlSet\control\LSA. Click on LSA
  3. If you don’t see LMCompatibilityLevel in the right window pane, then choose: Edit > New > REG_DWORD
  4. Replace “New Value #1” with “LMCompatibilityLevel”
  5. Double-click on LMCompatibilityLevel in the right window pane
  6. Enter “5”. (hexadecimal or decimal doesn’t matter)