Antivirus checklist before you pay
A short list to run before you install or pay for security software.
What you already have
Check Windows Security on a PC or read Apple's XProtect page for a Mac. Microsoft and Apple describe what each includes.
Updates
CISA says to keep antivirus definitions current and to turn on automatic updates.
Features you will use
List the features you need. Skip plans that charge for ones you will not use.
Devices
Count the devices and systems the plan must cover.
Where to download
Download only from the vendor's own site or your system's app store. Never from a pop-up.
Terms
Read the trial, renewal, auto-renew, and refund terms. See the current price at the vendor.
This is general information, not security or technical support advice.
Sources: Microsoft Support, Stay protected with the Windows Security app; Apple Platform Security, Protecting against malware in macOS; CISA, Understanding Anti-Virus Software (archived); CISA, Update Software (archived).
FAQ
Next: built-in protection
What your computer already has.
