I need to disable avast just briefly…Can anyone tell me how to do this correctly, and what would I do to enable it again?
1rst way:
Right click the blue avast ball in the system tray.
Go to “Pause provider” and select the provider(s) you want to stop.
To enable them again, choose “Resume provider”.
2nd way:
Right click the blue avast ball in the system tray.
Select “On Access Protection Control”.
Pause or terminate the provider(s) you want.
To enable them again, press the"start" button.
BTW, I suggest you read avast’s built-in manual 
Ok. Thank you. 