Windows 8.1 connection problems...

hey guys... is there anyone online who can advice me how to fix my windows 8.1 connections problems cause ive tryed already all my knowledge and cant fix it... so i got no idea what exacly happend cause my laptop is all the time online so maybe there was some update[original win 8.1 toshiba i3 6gb nvidia 512 bla bla] i didnt had those type of problems before i was playing normally like 3chars afk all the time but those times ended while am trying to open Mu fatality or MuBrazil both i was playing as a afk player cause of work but now client opening up to screen loading and client crash so ive tryed use as useuall launcher so ive getting kind of text in portugesee that i have some problems with compatiblity, so easy i tryed to change main same as launcher to Win xp sp3 to Win7 and still same shit I added those files to My computter exceptions and no results same, I turned off firewall same shit I tryed many other things and still same :(( am pretty upset while having 2days off from job pretty nice stoned cant even open game :x is there any smart member who can help stoned head how to fix that problems thanks for ur time! Ive tryed as well other servers and i made a little step cause few servers opening normally i mean up to the screen with choising server but straight away i getting dc so i got no idea honestly looking for help! regards and smoke weed everyday! waiting for answer

noone is able to help? noone knows how to fix it?? :/

There is no reliable solution for this since you might made it stop working.

100% Solution is to reinstall your OS *
other solution to uninstall all your graphic drivers and install again
other solution to try and allow the current muonline client/launchers from your gfx card to play.

That's mostly what my sober head can think of now, i'd go probably with OS reinstall it will take 2-3 hours but then you can play just like before insteade of wastin 2 days for nothing.