Message from Steam Support on Oct 29 @ 9:42pm | 2 weeks ago
Hello,

Thank you for contacting Steam Support. We understand your concern.

It looks like someone is attempting to login to your account.

If these attempts were not from you or a family member, please take the following steps to secure your account and computer:

Scan your computer for viruses, key loggers, spyware, and other malicious code using antivirus software with updated virus definitions.
Change the password for the email address that is associated with your Steam account.
Reset your Steam account password.

Please see our Security Recommendations article. We highly recommend that you enable a Steam Guard Mobile Authenticator.

If you still need assistance, please let us know.

Steam Support
Rebecca