any ideas why quickscan sometimes won't run?

only sometimes........

(i run it once a week, this happens every... 3 weeks.)

 

i try doing it via right-clicking the task tray icon and selecting "run quickscan", then if nothing happens, opening the program and clicking "run quickscan" on the main screen.

that never works when right-clicking the taskbar icon to do it doesn't work.

 

usually, after a reboot it'll work again.

so i have to set a reminder on my phone to remind me to run it the next day.........

 

it's getting old.

WHY does it refuse to run sometimes???