guys im not infected. i never downloaded anything unknown. that client downloaded from the site itself and i keept btc on it for long time and nothing happen.
what happened is i sent 2 transcation with low fees i tried to increase fees then i found that 3 transaction sent in same miniute and same second. i sent 2 and the third one not me. i also did not send any large amount so that virust did not replaced the wallet.
and noone know that i have btc so i believe its a bug or anyhthing like that
when i tried to increase fess for last transactions money gone.