Get rid of WinZip popups.
Open the Run window (click the Start button and type Run, or press Windows key + R).
Type compmgmt.msc.
On the left of the Computer Management window, expand System Tools > Task Scheduler, then select Task Scheduler Library.
In the top panel, scroll down to the end of the list until you find the WinZip Update Notifier entries (I had three). Each is set to update and notify ...
Select any or all of the WinZip Update Notifier entries.
In the lower right panel, click Delete.
Click Yes to confirm the deletion.