Hi, I am Dave, I will help you with this.
If you no longer have SQL Server installed on your PC, then you do not need that update, the best option would be to us the Microsoft Show/Hide tool to hide that update to stop Windows continually trying to install the update.
http://download.microsoft.com/download/F/2/2/F2...
Also, to protect your system, it is best to re-enable the Firewall.