What is tpnumlk.exe?

The genuine tpnumlk.exe file is a software component of Lenovo On Screen Display by Lenovo Group.
"Tpnumlk.exe", along with "tpnumlkd.exe" and a dynamic link library named "tpnumlkd.dll", is used by "TPONSCR.exe" in some 64-bit Lenovo ThinkPad Windows 7 laptops to present the on-screen display when CapsLock or NumLock is pressed. (Some ThinkPads use "CAPOSD.exe" for these displays but when that is present the "TPONSCR" suite of more than twenty modules is not.) Windows 8 and later has native on-screen display and Lenovo software is not needed. These programs reside in "C:\Program Files\Lenovo\HOTKEY\", (sometimes "\Lenovo\PkgMgr\HOTKEY"), and can be removed via the Control Panel. They used to install automatically with the Lenovo Thinkpad Configuration Utility but must now install separately. Lenovo, now China's leading PC manufacturer, was founded in Beijing in 1984. They both manufacture in-house and use Taiwanese and Chineseoriginal design manufacturers. As of 2011, Taiwan ODM's built 94% of the world's laptops, but in 2013 Chinese business increased. This may explain driver differences.

TPNumLk stands for Lenovo ThinkPad Numeric Lock

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 tpnumlk.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.

Click to Run a Free Scan for tpnumlk.exe related errors

Tpnumlk.exe file information

Windows Task Manager with tpnumlk
Tpnumlk.exe process in Windows Task Manager

The process known as NumLock indicator for ThinkPad belongs to software On screen display or On Screen Display or Anzeige am Bildschirm by Lenovo Group (

Description: Tpnumlk.exe is not essential for the Windows OS and causes relatively few problems. The tpnumlk.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 59,760 bytes (35% of all occurrences), 163,176 bytes and 4 more variants. 
The program is not visible. The tpnumlk.exe file is certified by a trustworthy company. The file is not a Windows system file. The file is a Verisign signed file. Therefore the technical security rating is 37% dangerous.

Uninstalling this variant: If you are having problems with tpnumlk.exe, you might want to uninstall the software On Screen Display or Anzeige am Bildschirm using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify tpnumlk.exe related errors

Important: Some malware camouflages itself as tpnumlk.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the tpnumlk.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.


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Best practices for resolving tpnumlk issues

A clean and tidy computer is the key requirement for avoiding problems with tpnumlk. 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 tpnumlk.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

tpnumlk.exe [all]