Friday evening I turned on my pc for playing trackmania. I still had win7 running at that time and all worked fine.
I could play Maniaplanet and TMUF with no problems.
There was a update for windows so I installed it and restarted the pc.
It seems to work fine , I had internet and could do what I always did execpt : Trackmania.
When I launched TMUF I could only play solo , when I wanted to play online I get : can not initialize network.
With MP its even harder , I can start the game, go online , see all servers but when I want to connect to one I can't. ( can not connect to server )
So I try the solo campain in MP , its even worse.
When I click on a map ( solo campain ) and want to play , the game just shuts down.
When I started my pc on saturday the problem was still there so I decided to reinstall both games. No effect.
Maybe it was time to switch to win10 ( what already was planned in the future ).
So I decided to wipe win7 from my pc and installed win10.
Peace of cake, no problems or errors.
I had win10 , virus protection and a firewal installed and all run fine.
Time to install TM and MP ( tmuf and maniaplanet ) , and yes I could play again !

But today , sunday, after a update of windows10 the same shit is back.
I can not play tmuf online cause : can not initialize network
I can not play MP cause I can not connect to servers , and the solocampain crashes when loading a map.
Why do I have this ?
I disabled firewall , virus protection ....... but nothing.
The strange part is I do have internet , I even can play other games online ( GTA V for example ) so its a bit strange.
Any suggetions are welcome.
Small update : When MP is launched I can chat ingame with my buddies, I still can not connect to online servers.
When I try to play on a local server tha game also crashes , just like playing a map in the solocampain.