If you are using the Windows Firewall to protect your computer and network, you can enable security logging. The default location for the firewall log is the Windows directory. However, if you do not want to file stored in this location, you can easily change it.

• Click Start | All Programs | Administrative Tools | Windows Firewall with Advanced Security.
• Click Windows Firewall Properties.
• Select the appropriate profile tab: Domain Profile, Private Profile or Public Profile.
• Click the Customize button under the Logging section.
• Within the Name field, type in the new path and file name.
• Click OK.
• Click OK to save your changes.