Error 1182 occurs stating that the activation failed with the message,
Either the time difference between local computer and Activation Server is too large, or the activation code is outdated.
BarTender 2016 and later
It is highly likely that the Windows machine's time and date are not properly synched when encountering this issue. The Windows user will need to re-synch the time and date in order to correctly activate this machine.
If you are not familiar with how to do this, please reach out to your IT department.