Autocad  (Licensing: The security system (Softlock license manager) is not functioning or is improperly installed)

• Start your computer in safe mode

• Locate this files :

C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data

C:\ProgramData\FLEXnet\adskflex_00691b00_tsf.data.backup

• Rename files extensions to ".old"

• Restart your computer and boot normally then reactive Autocad