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Danger level 10
Type: Adware
Common infection symptoms:
  • Slow Computer
  • System crashes
  • Connects to the internet without permission
  • Installs itself without permissions
  • Block exe files from running
  • Blocks internet connection
  • Blocks Internet browsers
  • Blocks system files from running
  • Can't be uninstalled via Control Panel


Trojan.LockScreen.EM is a malicious computer infection that most users discover only after it locks the desktop and presents suspicious information. As our researchers have discovered, you may be introduced to a screen-locking notification informing that your operating system is infected with malware. This may be the first warning signaling that you must delete an active Trojan. If you do not remove Trojan.LockScreen.EM, you will not be able to operate the system in a regular manner, and your security will become vulnerable.

Trojans are spread using deceiving scams, so that computer users could not discover and delete them before they are activated. Trojan.LockScreen.EM may enter the operating system silently bundled with other infections, or it could be executed after opening a corrupted spam email attachment. The distribution of this Trojan is unpredictable; however, the removal of this threat may depend on it. For example, if Trojan.LockScreen.EM comes packaged with other malware, you may have to delete other infections as well.

Once installed and activated, Trojan.LockScreen.EM can block executable files, block Internet connection, and change the background of your desktop. Unlike Ukash Virus, FBI Virus, or other screen-locking infections, Trojan.LockScreen.EM does not ask for money in return of screen unlocking. In fact, the purpose of this clandestine infection is unclear. Nonetheless, if you postpone the removal of this threat, it is quite possible that the threat will be updated and will be used to install other clandestine infections that will require removal. This is a great security risk, and so the removal of the Trojan should be performed ASAP.

The clandestine Trojan.LockScreen.EM can reconfigure the Windows Registry to unsure that the threat auto-runs with Windows, which means that you will face a locked screen every time you restart the PC. As mentioned already, the threat blocks executable files, which means that you will not be able to access the Registry Editor to remove corrupted registry keys or values. You will not be allowed to terminate malicious processes (e.g., DragonDay.exe) using the Task Manager either. Luckily, you can delete Trojan.LockScreen.EM components if you reboot the system into Safe Mode.

Do you think that the manual Trojan.LockScreen.EM removal is complicated? It sure is, which is why less experienced computer users should employ automatic malware removal tools to delete the clandestine Trojan. The installation of this software may seem complicated as well; however, if you follow the guides below carefully, you will have Trojan.LockScreen.EM deleted before you even know it. Using automatic malware removal software is particularly beneficial if you have to delete other intrusive infections as well.

Trojan.LockScreen.EM Removal

Remove from Windows XP:

  1. Restart the PC, wait for the moment BIOS loads and immediately start tapping the F8 key.
  2. In the Windows Advanced Options menu select Safe Mode with Networking (use arrow keys).
  3. Tap Enter on the keyboard to confirm the selection and wait for the system to reboot.
  4. Click Yes on the ‘Windows is running in safe mode’ alert to confirm safe mode.
  5. Navigate to the left of the Taskbar and click the Start button to open a menu.
  6. Click RUN and enter msconfig into the Open box to access the System Configuration Utility.
  7. Click the Startup tab, select Disable All and then click OK.
  8. Now download an automatic malware removal tool from .
  9. Restart the PC in normal mode and install the downloaded remover to delete Trojan.LockScreen.EM.

Remove from Windows Vista or Windows 7:

  1. Restart the PC, wait for the moment BIOS loads and immediately start tapping the F8 key.
  2. In the Advanced Boot Options menu select Safe Mode with Networking and tap Enter to confirm.
  3. Launch a browser and enter into the address bar.
  4. Follow the presented instructions to download and install a trustworthy malware remover.
  5. Scan the operating system and delete all of the detected threats.

Remove from Windows 8:

  1. Tap the Windows key on the keyboard to access the Metro UI menu.
  2. Launch a browser of your choice and visit .
  3. Download and install a reliable malware removal tool SpyHunter.
  4. Use a malware scanner to identify running infections and then click Fix Threats to delete them.
Download Spyware Removal Tool to Remove* Trojan.LockScreen.EM
  • Quick & tested solution for Trojan.LockScreen.EM removal.
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