I dont know the answer this

[MichaelWilson]

3 days ago everyone one of my online RPG's launchers stopped running. Wow,Dungeonsdragons, lordofrings and so on. need help quick thx. i use windows xp.

[MsEricka]

1) Are you connected to the internet?
If no, call your ISP tech support
If yes move to step 2

2) Do you use a router/nat/firewall?
If no, call your ISP tech support
If yes, call their tech support

And now you're back online!

[TheDearLeader]

Yes, it could either be that the ISP has decided to block these things, or that your Router's Firewall has suddenly decided it doesn't like them.

Also possible :
Your Windows Firewall is Blocking them.
Your Security Software's Firewall is Blocking them.
You don't have any of these things blocking anything on your computer, so you managed to catch a virus of some sort. Its blocking them.
You're using an Operating System that had its debut over a decade ago, it has some sort of bug that is blocking them.

If you can't figure anything out, my suggestion would be to backup what you want to save, do a clean wipe of your system and install some form of Windows 7. Download fresh copies of all game clients, reinstall them. All this, of course, after ensuring you've got some quality antivirus software on there.