What is logon.scr?

Please read below to decide for yourself whether the logon.scr 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.

Click to Run a Free Scan for logon.scr related errors

Logon.scr file information

The process known as Logon Screen Saver belongs to software Microsoft Windows Operating System by Microsoft (

Description: Logon.scr is an important part of Windows, but often causes problems. Logon.scr is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 509,952 bytes (41% of all occurrences), 219,648 bytes, 509,440 bytes, 220,672 bytes or 221,696 bytes. 
The program is not visible. It is a Microsoft signed file. It is a Windows core system file. Therefore the technical security rating is 4% dangerous; however you should also read the user reviews.

Uninstalling this variant: If there are any problems with logon.scr, you can completely remove Borland Database Engine (Control Panel ⇒ Uninstall a Program).

Recommended: Identify logon.scr related errors

Important: Some malware disguises itself as logon.scr, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the logon.scr 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.


User Comments

704 512 bytes, works as screen saver but no config, win xp x64 (2003 server core) sp2
It is the screensaver which will be displayed when we don't log on for a long period in the logon menu..
Can make strange problems, after one day of a running machine with disabled screen saver, i have more than 60 logon.scr processes running. Virustotal says it has no virus in the logon.scr under system32/ not possible to delete it.

Rating chart

Summary: Average user rating of logon.scr: based on 6 votes with 3 user comments. One user thinks logon.scr is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users think logon.scr is dangerous and recommend removing it.

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Best practices for resolving logon issues

A clean and tidy computer is the key requirement for avoiding problems with logon. 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 repairing of your installation or, for Windows 8 and later versions, 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 logon.scr 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.

Other processes

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