The part about malware: "be cautious of malware" can become "exercise caution against malicious software," "be alert to harmful programs," or "remain vigilant about damaging files."
"on" →upon.
Breaking it down:
The part about malware: "be cautious of malware" can become "exercise caution against malicious software," "be alert to harmful programs," or "remain vigilant about damaging files."
"on" →upon.
Breaking it down: