Those threads go nowhere. The OP's never provide enough info, and the same back and forth questions get asked in each thread. THe OP's never seem to give enough info to figure out what happened.
This is common enough now that it's in everyone's best interest to adopt a standard template/script of how an "I was hacked" thread should look, and what info should be included in the OP of each one of those threads. I'm not a security expert at all but I will take a rough stab at starting it off:
Screenshot of wallet showing the unauthorized transactions, and the ones before and after it
Address(es) where BTC were stolen from
Address(es) where stolen BTC were transferred to
List of all places on which wallet.dat were stored, including:
OS of machine, version, bitness (32/64 bit), etc
Any software firewall on the machine? What kind of policies are in place?
Is the machine behind a router with hardware firewall? If so, describe security measures in place/ firewall policies.
Stored in plain text/truecrypt/protected zip/encrypted drive/etc?
Is the machine a VM?
Describe security software setup of the machine (AV, anti-malware, etc). Are these services doing real time protection?
What browser(s) do you use? What kind of security precautions are taken for browsing (noscript, adblock, private mode browsing, etc)?
What files have been downloaded recently? (Note, this is probably a useless question because your machine could have been compromised long before you got into bitcoin)
Has the hacked wallet ever been stored in the cloud (dropbox, google docs, transfered via any email service, etc)?
Are the passwords for any of the machines, or cloud services on which the wallet has ever been stored shared with any of your other passwords?
How strong are the passwords? Describe char length, and what mixture of chars are used
Was hacked PC on when the hack took place?
Can you check your bitcoin client Debug logs for more info?
Can you check your router/firewall logs for any suspicious traffic?
I doubt I will have time to maintain this, so I would appreciate if someone else would like to take over creating & maintaining an standard "I was hacked" post template.