A customer reports that their workstation has become extremely slow and they suspect it might be infected with malware. You have scheduled a maintenance session and are going to use a set of tools to diagnose and address the issue. Besides running an antivirus scan, which one of the following options is a recommended method in ensuring further protection against malware?
Completely reinstall the operating system to guarantee the removal of any infections.
Restore the workstation from a known good backup before performing any scans.
Ensure the antivirus definitions are up to date before proceeding with a full system scan.
Disable the antivirus software temporarily to eliminate potential conflicts.