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If you haven’t recently tried to login to the Steam client… from the computer located at 139.190.253.134 (PK), someone else may be trying to access your account. You can view more info about this login attempt online.If you suspect someone else may be attempting to access your account, please either:
- Change your password immediately or
- Lock your account online and then request Support assistance to regain access to your account.
The Steam Support Team
https://help.steampowered.com