Hello, TucsonTom,
Please, see the pcture PIS1 attached:
- click on Parallels Internet Security icon in the tray (marked with 1) to open configuration window.
- hit correspondent buttons (near the number 2) to paue or stop scanning. If you click on Pause - you will get the screen you have attached to your post. Select "By user request only" and the program will wait untill you allow it to continue scanning.
- press on "Schedule" (marked with 3) to select the best time to run virus scanning. When pressed you will see the same as on picture PIS2. Hit "Change" (number 4) to specify exact time and periodicity.