Quick scan does not start

Hi, i use NIS (v22.2.5..15) on windows 7 Pro, Some times when i try to run quick scan it open the window but stops at initializing, it does not start the scan and it wont let me close the window either. when i click on the close button nothing happens.

When i reboot it works fine. but after prolonged use this happens. I have access to internet as well..