Really sorry for your lose....
But how you expect anyone to help you in this ? If you really knows how BTC work you should know that no one on earth can help you retrieve your BTC back, unless you trace your BTC to someone you know in real life, I do not thing there is any chance you get your BTC back .
That's the point, my idea is that maybe someone has seen the address where everything has ended up and knows who it belongs to; even if that might be being too lucky. Other option would be if someone was nice enough to hack the hacker
Tough luck... and sorry to bear the bad news but I'm afraid it's impossible for anyone to retrieve the funds for you, if indeed it was stolen by an unknown hijacker. And don't fall for anyone who might be able to tell you otherwise, at least, not to pay anything upfront to get it back.
The best you can do, I'd say, is to try and identify the person who stole it (are you sure no one from your family or friends did this? You did, after all, sign in via your friend's network). It could be your device was simply used by someone who guessed your password to sign and broadcast from your own Electrum?
You could also try sending messages to those addresses... in the hope that the thief might respond or negotiate some kind of return. I believe this has actually worked in the past, as long as you appeal to their sense of ego. Some people wouldn't agree with me on this though, but hackers have a certain personality that sometimes makes this possible.
Hopefully, you've already swept your device clean?
No way my friends did that, she doesn't even know how to connect her Nintendo DS to the internet. I don't think that they will ever answer, a lot of tima has passed ever since and I really doubt that. Computer was completely cleant after that. But the funny thing is that of the 3 wallets I had, only one was emptied
Was the laptop hacked, or was it stolen or physically used to send the coin to another address?
I assume it was hacked, since no one on the room had knowledge of bitcoin at the time things happened, and besides, the for obvious reasons, didn't know my password.
I may add a few more details, since I think I've been a bit vague on the OP.
I was using Electrum as my wallet, not Multi-sig since I had had a bit of an emergency and didn't have enough time to use the 2FA. I was at a friends' house, and the moment I opened my wallet to add the 2FA, I saw an outgoing transaction that had been created less than 1 minute before I opened the wallet itself.
Can you sign a message from the electrum address that originated the transaction to prove it belongs to you?
Sure I do