The 'Malware Scanner' WordPress plugin, as the name implies, works predominantly as a security scan system. Its fundamental aim is to ensure that your website remains safe from malicious malware that can severely affect your website's functioning and compromise your and your users' sensitive data.

The first fundamental task this plugin performs is a thorough scan of your website. It meticulously peruses every corner of your site, examining files and databases for any signs of malware. Even the most concealed and imperceptible bits of harmful code cannot evade the piercing scrutiny of this formidable plugin.

Noteworthy is that while performing its scans, this plugin ensures that your website's performance remains unhindered. It achieves this through its smart load-balancing system. Also, it avoids scanning the same files multiple times by keeping track of already scanned files, leading to efficient and quick threat detection.

When it comes to dealing with detected threats, this plugin follows a proactive approach. Upon discovery of a potentially harmful bit of code, it instantly notifies the admin via email. This ensures immediate awareness of the problem so that timely remedial measures can be initiated.

The 'Malware Scanner' WordPress plugin additionally performs daily automatic scans, which can also be customized to run at specific intervals. This consistent and regular check-up constitutes an essential preventative measure against potential inflictions.

Apart from its security role, this plugin facilitates the clean-up of your website. It includes a clean-up tool that assists you in eliminating any malware, unnecessary files, and other potential threats it detects during scans. Hence, it doesn't only indentify threats but also aids in eradicating them.