The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the winlogon.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.
The process known as Windows NT Logon Application or Windows Logon Application or Toepassing Windows NT-aanmelding or Windows NT-Anmeldung or Aplicación de inicio de sesión de Windows NT or Microsoft Windows Logon Process Service or Applicazione Accesso a Windows NT or Inloggningsprogram för Windows NT
belongs to software Microsoft Windows Operating System or Betriebssystem Microsoft Windows or Sistema operativo Microsoft Windows or Besturingssysteem Microsoft Windows or Project2 or scvhost or NTLOAD or Brontok.A
by Microsoft (www.microsoft.com) or China or ADMINPC or Gareth Software or NVIDIA (www.nvidia.com) (version 42722636448, 53732746459) or s21y7P99e82G78Z79UEfn or jdvsO or N5SD5K6S.
Description: The original winlogon.exe from Microsoft is an important part of Windows, but often causes problems. Winlogon.exe is located in the C:\Windows\System32 folder.
Known file sizes on Windows 8/7/XP are 502,272 bytes (36% of all occurrences), 507,392 bytes and 132 more variants.
The program is not visible. The file is a trustworthy file from Microsoft. Winlogon.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs. Therefore the technical security rating is 18% dangerous, however you should also read the user reviews.
Recommended: Identify winlogon.exe related errors
Is winlogon.exe a virus? No, it is not. The true winlogon.exe file is a safe Microsoft Windows system process, called "Windows NT Logon Application".
However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are e.g. Worm:Win32/Brontok.BH@mm or Trojan:Win32/Comronki!rts (detected by Microsoft), and Email-Worm.Win32.Brontok.q or IM-Worm.Win32.VB.di (detected by Kaspersky).
To ensure that no rogue winlogon.exe is running on your PC, click here to run a Free Malware Scan.
How to recognize suspicious variants?
External information from Paul Collins:
There are different files with the same name:
Important: Some malware disguises itself as winlogon.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the winlogon.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
A clean and tidy computer is the key requirement for avoiding problems with winlogon. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To help you analyze the winlogon.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.