If a computer is becoming slow, what is the most responsible first check?

Correct answer: Checking unnecessary open programs, storage space, and malware scan

Slow performance should be investigated before taking destructive action. Closing unnecessary programs can release memory and processor resources; checking available storage can reveal a nearly full drive; and a trusted malware scan can identify harmful processes. Important files should not be deleted blindly, and changing passwords publicly or discarding hardware is not a responsible first diagnosis.