They have stolen bitcoins from my official Bitcoin wallet.
Wallet had the password (about 30 characters)
Last time I've entered the password at least 6 months ago.
I installed Windows 10 in October.
Kaspersky Internet Security says no viruses.
https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL
What do you think thinks about this? The system is so full of holes?

(Russian version is here:
https://bitcointalk.org/index.php?topic=1278586.0  )