What is the best physical way to protect a user's system from malicious software attacks?
  1. Delete or restrict all permissions for non-administrators
  2. Purge all unused registry files regularly
  3. Delete or restrict power users only from the registry
  4. Use registry cleaner software programs monthly
Explanation
Answer - A - Never assign high privileges to non-administrators. Assign it to individuals who are concerned with the security of the setup and know about virus infections and risks.

Key Takeaway: Installing malicious software can infect the system seriously. It is mandatory to grant rights to install software to individuals with knowledge of virus infections. These individuals would typically install software after ensuring the legitimacy of the software. Hence the only way to prevent a malicious software installation is by restricting permissions for non-administrators to install software.
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