Hi there Bitdefender,
I have a Windows 7 32 Bits System connected through LAN at home on which i casually play League of Legends. After installing TS 2013 i was not able to use the Spectator mode anymore, in order to spectate other live matches. I always get the error that the host could not be reached. However, i am able to play the game with no issues.
As i to think about myself as being a tech savvy person, i tried to fix this myself. Here is a resume about my troubleshooting session:
-disabled TS modules one by one.
-added LoL folder and .exe in AV and Firewall exclusions.
-set every setting to permissive or tolerant.
-Firewall adapter setting set to : Home/office Stealth off Generic Yes
-IDS and Access Scan disabled.
Nothing has allowed me to be able to watch a live match in League of Legends. Only a complete TS 2013 uninstall fixed the issue. Bump.. 
Any advice is most appreciated.
Best regards,
Gabriel