Thanks for your advice, I felt safe, because I had Bitdefender anti virus programme installed, but that one completely disappeared. Looks like the attacker could delete it.
My bitcoins went to this address: 1GgJkUADnzZ6kNF13toGpv7o8bCj3WYQov
One attack came from this IP: 51.21.9.22 Netherland, NL
Second one from here: 198.38.94.199 ALAMO, CALIFORNIA, UNITED STATES 2015-04-09 06:59:08 EST
Can somebody help me to trace this guy ?
if he deleted the wallet, you have probably a rootkit or rat, because some antivirus have protection against cancellation from malware(i know malwarebyte has chamaleont)
tracing him would be really hard because it seems he is using a proxy/vpn