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Open Avast. Find and access the “Security” tab. Click on “Summary. Click on the shield you want to deactivate. Click on “Stop. Choose the length of time you want to disable the shield. Click on “Yes” to confirm. Reactivate the shield.
Do this by clicking the shortcut icon on the desktop or selecting it from the program list. This should be located in the Overview/Home tab. Click on it " This is located on the left menu panel. You will see all the details on Security. Avast 2014 free version has 8 types of shields. Each shield has its own specialty that can be identified by its names:  File System Shield Web Shield Mail Shield Network Shield P2P Shield IM Shield Behavior Shield Script Shield Details of the shield can also be found once you click it. " This should be located on the upper-right portion of the window (right between “Start” and “Settings” button). A sub-options will pop up.   Repeat steps 2 to 4 and click on “Start” to set it on again.