Member Avatar for jkiser

I have been invaded by a false windows security screen anybody seen this one?

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— that description matches common "scareware" (fake antivirus) scams. They either pop up inside a browser tab or, in more aggressive cases, load before the desktop so they look like a system security dialog. 's suggestion about an altered logon component is a useful lead: whether the message appears only in a browser or at boot changes how you approach cleanup.

Do not click any download or "fix" links and disconnect the PC from the Internet. If you can still use Windows, try starting with a clean offline scan (boot rescue media if possible) and a reputable on-demand scanner once offline. Two trusted options are Malwarebytes for in-OS removal and Microsoft guidance/tools for offline scans and recovery in more serious cases (Microsoft security overview). Back up personal files first by attaching the drive to another computer or using a live USB if the system is unstable.

If core files were replaced you may need repair with install media or a reinstall after data recovery. If the popup tells you to buy or download a named product, do not pay or install it. Post the exact popup text or a screenshot here and say whether it runs in a browser or before logon; and others can help identify the specific rogue and recommend step-by-step cleanup.

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Member Avatar for jbennet

do you mean that something has replaced winlogon.dll?

if so, try sfc /scannow (will need a windows cd)

Member Avatar for caperjack

there are so many,does it want you to download a program to fix you security problem if so what program .

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