Bitcoin transactions are irreversible so you can't get back your bitcoins. You say it's an offline wallet. Does that mean that the computer on which you installed electrum never went online? Do you have an online watch-only wallet?
I did a standard new wallet installation. I dont know if means off or watch only wallet. I did already transactions in the past. I got seed and private key. I guess i did something unsafe, anayway i thought to be safe with seed authetication e private key. What should i do to prevent another robbery next time? Use a different version? Setup?
what about your electrum's password? is it safe enought?
Some other people use your pc?
This is really strange....have you try to scan your pc with antivirus/anti-malware/anti-spyware?
