Instructions
Open the "System Settings" menu on the PS3. Scroll to "System Information" and then "Network Settings." Find your PS3's MAC address located towards the bottom of the page and write it down.
Double-click on the Windows "Control Panel" on your PC. Click on "Network and Sharing Center." Click on "Change Advanced Sharing Settings" in the left-hand side bar.
Click on the "Turn on network discovery" and "Turn on File and Printer sharing" radio buttons. Click on the "Choose media streaming options" below.
Designate "All networks" in the drop-down menu. Double-click each "Unknown device" to see the MAC address of the device. Choose the device that matches the MAC address of your PS3. Click on the button next to the device to allow it for media sharing.
Click on the "Search for Media Servers" in the "Video," "Music," or "Photo" menus on your PS3. Click on your PC to access files on it to transfer across.