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Protect your computer from malware

Malware is any software designed to harm your computer, steal information or lock your files. The good news: a few simple habits block most of it, and the tools you need are already built into Windows and macOS.

1. Keep the built-in protection turned on

Windows includes Microsoft Defender Antivirus and Macs include XProtect. Both run quietly in the background and update themselves.

  • Windows: open Start > Windows Security > Virus & threat protection. You should see a green check mark and no actions needed.
  • Mac: XProtect has no on/off switch. It stays current as long as automatic security updates are allowed in System Settings > General > Software Update.

Never disable your antivirus to get a program or website to work, even if instructions online tell you to. If something is being blocked, ask us first. There is usually a safe way to do it.

2. Install updates promptly

Most malware gets in through known security holes that have already been fixed by an update. Allow Windows, macOS, your web browser and programs such as Microsoft Office and Adobe Reader to update, and restart your computer when asked. See our article on keeping your devices updated for step-by-step instructions.

3. Use a standard account for everyday work

An administrator account can install software and change system settings, and so can any malware that runs while you are signed in to it. For daily work, use a standard account and keep the administrator password for installations only.

  • Windows: Settings > Accounts > Other users (or Family & other users).
  • Mac: System Settings > Users & Groups.

If you would like help setting this up for your team, we can do it with you.

4. Be careful with downloads

  • Download software only from the official website of the company that makes it, or from the Microsoft Store or Mac App Store.
  • Avoid "free" versions of paid programs, browser add-ons you didn't ask for, and download buttons inside ads.
  • Be suspicious of email attachments you weren't expecting, especially ZIP files, files that end in .exe, .js or .iso, and Office documents that ask you to "Enable Content" or "Enable Macros".
  • If a website suddenly says your computer is infected and gives you a phone number, it's a scam. Close the browser.

5. Treat USB drives with caution

  • Never plug in a USB drive you found or received from someone you don't know.
  • Use your own drives, and don't share them between home and work computers when you can avoid it.
  • For sharing files, a business cloud service such as OneDrive or SharePoint is usually safer than a USB drive.

6. Have a backup

No protection is perfect. A recent, working backup is what lets you recover if malware damages or locks your files. Make sure your backups run automatically and are tested from time to time.

Signs that something may be wrong: the computer is suddenly very slow, new toolbars or programs appear, your browser home page changes on its own, or friends receive strange emails from you. If you notice any of these, stop and contact us before trying to fix it yourself.

Published on - 02-11-2023 11:41am

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