What is BttnServ.exe?

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 BttnServ.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.

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BttnServ.exe file information

The process known as Button Server or Image Compiler belongs to software Easy Access Button Support or BttnServ Module or Nero StartSmart by Compaq Computer ( or Ahead Software AG (

Description: BttnServ.exe is not essential for the Windows OS and causes relatively few problems. BttnServ.exe is located in a subfolder of "C:\Program Files"—mostly C:\Program Files\compaq\easy access button support\. Known file sizes on Windows 10/8/7/XP are 122,880 bytes (90% of all occurrences) or 106,496 bytes. 
The program is not visible. The BttnServ.exe file is not a Windows core file. Therefore the technical security rating is 42% dangerous, however you should also read the user reviews.

Uninstalling this variant: You could uninstall the software Easy Access Button Support using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify BttnServ.exe related errors

If BttnServ.exe is located in the C:\Windows\System32 folder, the security rating is 22% dangerous. The file size is 65,536 bytes. The program has a visible window. The process is loaded during the Windows boot process (see Registry key: MACHINE\Run). The file is not a Windows system file. BttnServ.exe appears to be a compressed file.

External information from Paul Collins:

Important: Some malware camouflages itself as BttnServ.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Worm.Win32.AutoRun.bne (detected by Kaspersky), and TrojanSpy:Win32/Vwealer.PA (detected by Microsoft). Therefore, you should check the BttnServ.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.


User Comments

fix it
  Jamie Thompson  
I cannot kill this process! Even Process Explorer(from could not kill it. I cannot delete the file. The key combination "Ctrl-Alt-Delete" is no longer recognised! Hence, I can no longer lock my workstation or logon to a Windows!!!
  Anand Shekhar  
Compaq Easy Access Button Driver
bttnserv.exe provides support for Compaq EasyAccess buttons on their range of multimedia keyboards. Without this service, the additional buttons will cease to function. This is a non-essential process. Disabling or enabling this is down to user preference
ist die Dateigroesse 188kB, ist es ein Wurm

Summary: Average user rating of BttnServ.exe: based on 4 votes with 5 user comments. 3 users think BttnServ.exe is essential for Windows or an installed application. One user thinks BttnServ.exe is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving BttnServ issues

A clean and tidy computer is the key requirement for avoiding problems with BttnServ. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the BttnServ.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

BttnServ.exe [all]