Create a couple extra user accounts that have full administrative powers. Restart on one of those accounts.
Repeat the the cleaning steps, including the dis-abling and re-enabling of System Restore.
Use the computer for a while in order to see if the problme has persisted --- probably not. Then, restart on your perferred user account if you wish, though you might now prefer to continue operations by way of one of the new user accounts.
Then install ZoneAlarm Pro. You can purchase it online, here:
http://www.zonelabs.com/store/content/catalog/products/sku_list_zap.jsp;jsessionid=AYisWylvMio6aWkfVZ5Do1CVJcpzlpRnT3NF3Af9F2qAggicbm7u!1965445848!-1062696905!7551!7552!1463396273!-1062696904!7551!7552?lid=zasskulist_pronav
Use the default settings; during the setup, err on the side of automation and do not fret.
http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/Q263/4/55.ASP&NoWebContent=1