I thought this was triggered by a whole bunch of services i turned off, it turned out that it was the security settings on my router that i had done a week or two prior.
Here's how i fixed the problem within 5-10 minutes.
Firstly i suggest dropping your windows firewall and restarting league, if the issues persists follow the below steps at your own risk.
Troubleshooting Steps:
- Access router settings Via web browser address bar as following.
Rogers:
192.168.0.1
Bell
192.168.2.1
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Log on Via default password or set password.
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Locate the security tab and set to typical and hit save changes at the bottom of the web page.
(I had mine on custom, P2P OFF and IDENT OFF and it would not work, you can always change these back.)
4.Enable Port Forwarding. I'm not sure if this helped as i had it enabled before hand but riot does suggest it none the less, Here's how.
https://www.youtube.com/watch?time_continue=11&v=fkxhsxaqkPI