A technician is setting up a new workstation for an employee. Which of the following actions is the MOST important security step to perform first?
Install a third-party antivirus application.
Encrypt the hard drive using BitLocker.
Configure a screensaver with a password lock.
Change the default administrator account credentials.
Changing the default administrator account's username and password is the most critical first security step. Default credentials are often publicly known and can be easily exploited by attackers to gain immediate administrative access to the system. While other security measures like installing antivirus, encrypting the drive, and configuring a screen lock are important, they do not address the immediate vulnerability of default credentials.
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