If you trust software that Microsoft Security Essentials has detected, you can stop Microsoft Security Essentials from alerting you about risks that the software might pose to your privacy or your computer. To stop receiving alerts for this software, you must add the software to the Microsoft Security Essentials allowed list. If you decide that you want to monitor the software again later, you can remove it from the Microsoft Security Essentials allowed list at any time.
To add an item to the allowed list
The next time Security Essentials alerts you about the software, click the Show details link.
In the Potential threat details dialog box, click the down arrow in the Recommendation column, and then click Allow.
To remove an item from the allowed list and enable Security Essentials to monitor it
Click the History tab, and then select the Allowed items option.
In Windows Vista or Windows 7, click View details to see all of the items. If you're prompted for an administrator password or confirmation, type the password or confirm the action.
In Windows XP, you'll need to log on as an administrator on the computer to see all of the items.
Select the item that you want to monitor, and then click Remove. If you're prompted for an administrator password or confirmation, type the password or confirm the action.
Do not allow software with severe or high alert ratings to run on your computer, because it can put your privacy and the security of your computer at risk.