You definitely have a huge security hole!
I advise you to reinstall Windows, after saving all the data.
Install a new clean Legal version.
Install Kaspersky Anti-virus on it.
Check all the extensions in google chrome. Malicious ones are sometimes found among them.
Store passwords on a USB flash drive and not on a computer.
Get new wallets and change passwords everywhere.
I think your whole system is compromised.
Thanks
And all possibly true, but the one really odd thing is that I have four Blockchain.com wallets, three of them had small sums in and I just used them to play about with a few things without risking my main wallet which I do not go near, none of them are linked in anyway I might add.
Funny how they went straight to the one and only well paying Blockchain wallet without even touching the other three which I never gave a shit about and had little security.
Was talking to a pretty clued up programmer this weekend in Cambridge who plays about with crypto, his money is someone working at or connected with blockchain.com