How could Skype be hacked along with changing the mail that was tied to the account?

Question

Skype

Hello,
Today I received an email:
Hi igor.sv,
Registered email successfully updated
Your email address for the account igor.sv has been successfully updated to [email protected] Visit your account to review your changes.
How can this happen? The password is complex. The antivirus is silent. Now a person is sitting behind my account and asking for money ..

Answer 1

easy password guessed

Answer 2

Antivirus is not a panacea.

Answer 3

A similar situation, the same mail of the attacker
[email protected]
my mail is not hacked.

Answer 4

Use Linux. Crypting a Trojan is not difficult