(UNRESOLVED) Ping often jumps to 999

I have the exact same problem. Every 5 minutes my ping jumps to 999 and goes back to normal again after about 1 minute. But i recently noticed something weird. While my ping was going up to 999 i tabbed out of the game by accident. As i tabbed in again after about 1 sec on the desktop my ping was normal again. So tabbing out and in again solved the problem in 5 seconds. But after 5 minutes the same thing.. ping going up again :/

Heres a screenshot with lagometer as my ping is going up:

 

http://s7.directupload.net/file/d/2923/3lgnmccf_jpg.htm

 

The red bar thing appeared while i tabbed out of the game.

And sry if my english is bad im german.

 

If you have hamachi try to turn the adapter off in the network settings.

 

I dont have hamachi or tunngle and i also made sure that no other devices are connected to my router and i dont have any other programms running which connect to the internet. But it didint help

 

So i guess you have wireless internet?

My pc is connected to the router with a lan cable. My ipod, Notebook and Smartphone are connected with wireless lan. So i turned off wifi on these.