Script error debugging and notifications are turned off by default. If they have been turned on, follow these steps to turn them off again.
Open Internet Explorer
Click the Tools button on the top menu bar and then click Internet Options.
Click the Advanced tab and in the Settings Window, check the boxes next to: Disable script debugging (Internet Explorer) AND Disable script debugging (Other)
4. Clear the Display a notification about every script error check box, and then click OK.