If you would have bothered to read their website before running a "localhost" website you would have known to run a firewall to protect your system. Here is a quote from XAMMP's website: http://www.apachefriends.org/en/xampp.html
"The philosophy behind XAMPP is to build an easy to install distribution for developers to get into the world of Apache. To make it convenient for developers XAMPP is configured with all features turned on. The default configuration is not good from a securtiy point of view and it's not secure enough for a production environment - please don't use XAMPP in such environment."
