Lots of people are having problems with the gameguard, error or whatever, this is simple solution for all of you, use it for walker or just for clean play, doesnt matter :P
1.
First download this file
http://www.2shared.com/file/10207283/1f1b1485/GameGuard_Disable.html
2.
then extract it to c: or doesnt matter.
3.
Copy host file to c:\windows\system32\drivers\etc or just go
to c:\windows\system32\drivers\etc and open host file and put this there
127.0.0.1 localhost
ServerIP l2authd.lineage2.com
127.0.0.1 L2TestAuthD.Lineage2.com
127.0.0.1 nprotect.lineage2.com
Save it and close it...
4. Open folder where you extracted it, and then start "start.bat" if you did everything well, new page would be opened with 127.0.0.1 in the adress
Thats it, this method is ultimate, i used it always and its working so no discusion about that, probably working for higher version too but I DIDNT TRY IT :D
/////5. else when you wana close it just start "stop.bat" or if you need to restart it
Basically it opens new virtual drive and bypasses gameguard...
Credits : Some unknown guy, which im very thankfull and you should be too :P , i did only guide ...
I searched for same topics but havent find any so i hope it wasnt posted...