Click on screenshot to zoom
Danger level 7
Type: Trojans
Common infection symptoms:
  • Connects to the internet without permission
  • Installs itself without permissions
  • Can't be uninstalled via Control Panel Screen Locker Screen Locker displays a blue borderless window that accuses of using a pirated Windows copy. We believe the hackers behind the threat might try to trick users into paying for a license they do not need or revealing their product key to them. Fortunately, the warning contains grammar mistakes, which should suggest that the notification could be fake. Needless to say, the answer is yes, the alert is fake, as it does not come from your operating system. Therefore, if you see the window displayed by Screen Locker, you should not believe any word it says. Instead, we recommend closing the note at once and removing the threat. As usual, the instructions located below will explain how to get rid of it manually, and if you find the task difficult, you could use a reliable antimalware tool.

Further, in the article, we would like to talk more about the fake warning displayed by Screen Locker. First of all, we should start from how it might appear on your screen. Our researchers say fake alerts often appear after opening suspicious files downloaded from the Internet. It could be any data received via email too. Another thing we should stress is files that may show fake alerts or install malware on the system might not necessarily look harmful. In other words, threat installers can look like pictures, various documents, and other types of data you would not suspect. Because of this, we always recommend being careful with any data that comes from untrustworthy sources. It is best to scan it with a reliable antimalware tool first instead of opening it and possibly putting your system at risk.

What is interesting is that Screen Locker might claim it will encrypt files on the computer, but according to our researchers, it only locks the screen. The threat does so by placing the earlier mentioned borderless blue window. The text on it should show a statement in a large size font saying: “Your Windows has been Banned.” Slightly below it, the user should find a message written with smaller font letters. It explains that the Windows operating system on the computer is “fake” and that the device is locked due to it. It may also suggest going to for further information. Plus, a bit below it, there should be a button called “What to do now?” We believe clicking it might take users to some site where they could contact the hackers behind Screen Locker.

As we explained in the beginning, it is possible the threat’s developers might try selling fake product keys to activate Windows. Also, if the user claims to have a valid product key already, they could ask to insert it in the box provided below the fake alert’s main text. We recommend not to do this, as it is possible hackers could obtain what you type in this box. What we advise is not to pay any attention to what the notification says and to get rid of Screen Locker at once. First, users need to unlock their screen, and according to our researchers, it is a rather easy task since the screen should be unlocked at once after pressing Alt+F4.

Lastly, once Screen Locker is no longer blocking your screen, you should erase it to make sure it does not come back. The instructions located below can tell you how to handle the threat manually. Naturally, if the task looks complicated, you should employ a reliable antimalware tool. Scanning the computer with it could help you find other possible threats too and to eliminate all detections at the same time, you would only need to press the provided deletion button. Also, if you need more help or have other questions about Screen Locker, do not hesitate to leave us a comment below the instructions.

Get rid of Screen Locker

  1. Press Alt+F4 to unlock the screen.
  2. Click Win+E.
  3. Find these paths:
  4. Locate the fake alert’s launcher (so suspicious recently downloaded file).
  5. Right-click it and select Delete.
  6. Then go to this path: C:\Users\User\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
  7. Find an executable file called winban.exe, right-click it and choose Delete.
  8. Close File Explorer.
  9. Empty your Recycle Bin.
  10. Reboot the computer.
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