I check antivirusnik, nothing,
I have no idea what that means. My point here is: if your machine is infected the installed software or any software you install later will most likely not detect the virus.
I changed the password and I come from a different computer, all the same,
The attacker only has to access your account once to export the private keys, changing the password will not help you.
I look at the purse thief 1NLrk9PDNcaAV6oYbVNtzzs7J2X9WCEoM3 is a lot of transactions, but do not block!
It is not possible to "block" a bitcoin transaction. Anyone that has the private key can spend the coins. There is no need to have access to your account.