Until recently I've been unable to connect my PS3 to PC since installing ESET Smart Security 4.
I've managed to get it working with a little help from ESET Tech guys & thought it might be helpful to anyone else with the same problem.
This is what I did, hope it works for you guys...
1. Go to this link & follow instructions, using the PS3 Media Player .exe file instead of the Windows Media Player .exe.
http://www.igoy.in/ps3-media-sharing-es ... -solution/
2. Before you get to stage 5 in the above instructions, click on the Remote box, New port, <<select port>> :HTTP, Number:80, then apply settings.
3. Start up PS3 Media Server& in General settings, Force port of the server: 80