My wallet hasn't been hacked, -snip-
Well, Kraken can't be blamed here since they don't have access to your wallet's private keys.
After you've sent it to your Electrum, only the private key of the address where it was sent to can spend it, in this case, your Electrum wallet.
The possible causes are: compromised PC, leaked private key or seed phrase.
Based from available information at the moment, it seems like you're not the only one who's got robbed.
But it's not possible to tell how without knowing the PC's condition (
how it's used) and how the wallet is created.
ive been using the same electrum ive had since 2018 so it's not possible that its fake
Have you updated Electrum lately? Say, a message when you tried to send a transaction?
If so, what was your Electrum version prior to the update?
That's because most versions from 2018 are vulnerable to phishing malicious messages from rogue public servers.
Also, verifying its signature will clear all doubt about it being fake, guide:
https://bitcoinelectrum.com/how-to-verify-your-electrum-download/You can download the signatures for old version in "
Previous Releases" link in Electrum download page.