Hi there MaryEdgeFive, I will be your Independent Advisor for today, I hope we can both resolve your problem.
It may be that the PUA:Win32/Zugo Toolbar is no longer active but still remain in Windows defender. Please follow the link below on how to remove the detection history from your PC.
https://answers.microsoft.com/en-us/protect/for...
And please try to re-scan Windows Defender to double check if it will still detect it.