Guild Wars 2

So i had huge lag, and I have changed my server and it did not help. Then I reset the router, and made this:

You can execute switches directly from your Guild Wars 2 shortcut:

Right click on your Guild Wars 2 shortcut and select ‘Properties’.
In the ‘Target Area’ field you will see the location of your Guild Wars 2 executable file:
…\Guild Wars 2\Gw2.exe
Write the desired command line arguments after the quote marks, each beginning with a space:
“…\Guild Wars 2\Gw2.exe” -repair

and it helped me ,it fixed 18 files,now works perfectly I even started playing PvP,
I just wanted to share may help someone else.

do you have cable? my friends who also play gw2 aren’t on cable but t-com adsl have no problem, but my friend and I have cable, and have huge lag, and disconnect.
I am from Croatia and server Gandara.
edit: changed 2 servers same problem