nothing but lag and disconnects

Vallter: Please, don't panic. Some security settings were returned to default after upgrading your OS. Please make sure your antivirus software or firewall do not block the client connection with the server. During the first game start bring the game application in the trusting list.
Please open the following ports in the net settings:
• UDP range 3478, 3479, 5060, 5062, 12000-29999 and 32800-32901
Allow WorldOfTanks.exe to use UDP and TCP protocols.
As well as IPs: 174.34.231.0-174.34.231.255
If you use Proxifier, please open the following ports:
3128,80,8080,20000-25000,32801,32803, and crucially - 443.
Please open the directory "C:\WINDOWS\system32\drivers\etc" (Windows XP) or open the directory "c:\Windows\winsxs\" and search for "hosts" (Windows Vista/7), choose the "hosts" file, open it with the notepad and type manually: 174.34.231.143 login-master.worldoftanks.com
All the in-game settings and hosts, used by the game, can be traced in the "preferences.xml" file - "C:\Documents and Settings\(USER NAME)\Application Data\W"\
Please let us know of the outcome