Connexion lost all the day

[scalle]

It's all on same PC because we are 4 playing TE here home,so i always have all accounts open (like i always did the last 3,5 years,playing on old then new platform) when we are home.
This is only to make it easyer to support friends,it's all in one,so no need to start all smartphones and/or tablets ; foons and tabs are more to play when a live game starts
And this happens on all screens (browsers) but not at the same time,that's why i'm sure internet it's not the problem.
There is a particular thing (tried today),if i stay active on all accounts,like going every 5 or 10min,only to click somewhere or to support a friend,i never loose connexion,if i don't do it i loose connexion after maybe 30min or somethimes less then that.
This NEVER happened before!!
I got TE update last week on all browsers,Can it be that we loose connexion NOW AFTER NOT BEING active for some time?
Don't know if you know something about that

I have checked all yesterday,PC runs great,no virus and i have updated Java,but still the same today,now i only need to make a last update,got massage from Nvidia yesterday so gona do it today!