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Clicking a phishing link does not, by itself, prove that malware was installed. The destination may have been trying to steal your password or payment details instead. What you did next matters: check whether anything downloaded or opened, whether you installed an app or extension, whether you entered account information, and whether the device is behaving differently.
Use the steps below to assess the device and protect any accounts you may have exposed. A scan can help, but no single symptom or clean scan conclusively settles whether a device is infected.
First, work out what happened after the click
Think through the sequence rather than treating the click as proof of infection. A phishing page can collect information you type into it without installing software. A download that you opened, an app you installed, or a browser extension you added creates a separate malware concern.
- You only opened the page: This alone does not establish that malware was installed. If you typed a password, card number, or other sensitive information, follow the account-protection steps below.
- A file downloaded: Note its name and where it was saved. If you have not opened it, do not open it. If you did open it, run the security checks below.
- You installed an app or browser extension, or followed a command or installation prompt: Treat this as a stronger reason to scan the device and seek trusted help if the scan detects a threat or unusual behavior continues.
- You entered credentials or identity or payment details: Protect the affected accounts and information even if the device appears normal. Account theft and malware are different risks.
Check the device for warning signs and scan it
Look for behavior that changed
The FTC lists possible malware clues including a computer that slows down, freezes, or crashes; browser home-page changes or unrequested redirects; unfamiliar toolbars or add-ons; more unexpected pop-up ads; repeated operating-system errors; security or system tools such as Task Manager or Activity Monitor becoming unavailable; and emails or social posts sent without your action. These signs warrant investigation, but none alone confirms malware.
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Update security software and run a scan
- Update the security software already installed on the device so it can use current threat information.
- Run a scan using that software and follow its instructions if it detects a threat.
- If the scan reports no threat but the device still behaves unusually, do not treat the result as proof that the device is clean. Ask a trusted support source for help.
The FTC warns that malware can temporarily evade security software. A lack of symptoms is not a guarantee either, so use what happened after the click, the scan result, and any continuing behavior together rather than relying on one check.
Understand what browser link protection can—and cannot—tell you
Browser protections can block some known dangerous destinations, but they do not determine whether a file or app installed during a previous visit. Microsoft says Defender web protection checks links against an updated list of known dangerous sites; on Windows, SmartScreen provides this protection in Edge. A warning, a page that loaded, or no warning is not a forensic diagnosis of the device.
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Microsoft describes its web protection feature as not seeing your browsing activity. That statement applies to this specific feature and should not be generalized to every security product or service.
Protect accounts and personal information you entered
- Stop signing in to banking, email, shopping, or other sensitive accounts on a device you suspect may have malware.
- From a separate trusted device, change the passwords for accounts whose credentials you entered on the phishing page. Use unique passwords rather than reusing the exposed one.
- Enable two-factor authentication on the affected accounts where available.
- If you exposed Social Security, bank, or card information, use IdentityTheft.gov for recovery guidance that matches your situation.
These account steps matter even if a device scan is clean: a phishing page may have captured credentials without installing malware.
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For a personal device
If security software detects malware, or symptoms continue after a scan, contact the device manufacturer, a company you already know and trust, or a knowledgeable person. Do not call a number displayed in an alarming pop-up or accept unsolicited technical-support offers; fake support messages can be another way to exploit the incident.
For a work-managed device
Tell your organization’s IT or security team promptly and follow its incident process. Organizational response can include isolating an affected workstation and having specialists analyze it. Those are enterprise response steps, not universal instructions for personal devices; do not improvise a workplace response in place of your organization’s process.
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Keep the three questions separate
| Question | What helps answer it | What it does not establish |
|---|---|---|
| Was malware installed on the device? | What downloaded, opened, or was installed; changed device behavior; and an updated security scan. | A click, a browser warning, or one clean scan does not settle the question. |
| Were credentials stolen? | Whether you entered a password or other account information; protect affected accounts from a separate trusted device. | A normal-looking device or clean malware scan does not show that credentials were not captured. |
| Is the device work-managed? | Your organization’s IT/security incident process. | Consumer self-help steps are not a substitute for organizational response. |
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