On your computer, please do not install more than one antivirus. You’re certainly welcome to use any antivirus you like: Bitdefender, Avast, McAfee, Norton, etc. But only one. Two antiviruses is too many. If you want to change your protection software, uninstall your current AV before bringing in the new one.
Why? The reasons can get complicated, but I’ll keep it brief: Two protection systems can fight with each other and your computer will suffer the fallout. Multiple active antiviruses on a computer can lead to bogged down performance, strange errors, or web-browsing issues.
So whichever antivirus you like, stick with just that one, and don’t pile on any others. If you feel that you need extra protection, consider adding an ad-blocking extension into your browser!
One exception: Microsoft Defender Antivirus (built-in to Windows and found under the white shield icon) is smart, and will turn itself off automatically if you install any other antivirus. And it should turn itself back on if you uninstall all other antiviruses.
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