how do i check my computer for viruses

Robert Green 0 Reputation points
2026-08-26T17:24:17.9466667+00:00

microsoft defender said my computer was locked down. how do i check it for virus scams?

Windows for home | Other | Security and privacy
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  1. Ferdinand Nanalig 33,405 Reputation points Independent Advisor
    2026-08-26T17:57:04.0966667+00:00

    Hi,

    Let me help you with this issue.

    I understand you got a pop-up on your screen with a Microsoft technical support number.

    The number that showed up on your screen is not an official Microsoft support number. It’s part of a tech support scam. Microsoft does not display phone numbers for you to call on pop-up messages.

    Scammers often use pop-up warnings to trick people into thinking their computer has a virus or other issue, prompting them to call a fake support number. Once contacted, scammers may guide victims through steps to gain remote access or install harmful software.

    Run a Full Antivirus Scan: Use Windows Defender or any trusted antivirus software to scan for any malware.

    Check for Unwanted Software: Go to Control Panel > Programs > Uninstall a Program and see if any unfamiliar software has been installed.

    Change Your Passwords: If you entered any personal information or allowed remote access, change your passwords (especially for important accounts like email, banking, etc.).

    Check for Remote Access Software: Make sure no remote access programs like TeamViewer or AnyDesk have been installed.

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  2. AI answer

    2026-08-26T17:24:36.0333333+00:00

    That message was likely a tech support scam, especially if it showed a phone number or a browser page that looked like Windows or Microsoft Defender. Real Microsoft error and warning messages never include a phone number.

    To check the PC safely:

    1. Close the scam page.
      • If it is stuck full screen, press Alt+F4 to close the browser window.
      • If that does not work, press Ctrl+Alt+Del, open Task Manager, and end the browser task.
      • If the browser later offers to restore tabs, do not restore the scam page.
    2. Run a malware scan in Microsoft Defender.
      • Open Microsoft Defender.
      • Select Device details.
      • Select Manage in Windows Security.
      • Select Quick scan.
    3. If a deeper check is needed, run a stronger scan.
      • In Windows Security, go to Virus & threat protection > Scan options.
      • Choose a deeper scan type.
      • For the most complete scan, select Microsoft Defender Offline scan.
      • Warning: Defender Offline restarts the computer, so save open files first.
    4. If any scammer was contacted or given access, take extra steps.
      • Uninstall any app they asked to install.
      • Change passwords.
      • Monitor sign-in activity.
      • If money was paid, contact the bank or financial institution.
    5. Keep the device protected.
      • Install security updates through Windows Update.
      • Download software only from official vendor sites or the Microsoft Store.
      • Use Microsoft Edge, which can help block known support scam sites and pop-up loops.

    Common signs that can justify a scan include:

    • The PC suddenly runs much slower
    • Battery life drops significantly
    • Data usage increases unexpectedly
    • Unexpected ads or pop-ups appear
    • The browser redirects to different sites

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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