What is penusa.dll?

Penusa.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if penusa.dll is a Windows system file or if it belongs to an application that you can trust.

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Penusa.dll file information

The process known as Microsoft Tablet PC Component or Microsoft USA Handwriting Input UI or Microsoft Office Professional Edition (version 2003)

belongs to software Microsoft Windows Operating System or Microsoft® Handwriting Input UI or Microsoft Office Professional Edition or Microsoft Office XP Professional with or Microsoft Office Professional or Microsoft Office Standard Edition (version 2003) or Microsoft Office XP Professional

by Microsoft (

Description: Penusa.dll is not essential for the Windows OS and causes relatively few problems. Penusa.dll is located in a subfolder of "C:\Program Files\Common Files"—generally C:\Program Files\Common Files\Microsoft Shared\Ink\. Known file sizes on Windows 10/8/7/XP are 1,536 bytes (57% of all occurrences) or 372,802 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program has no visible window. The service has no detailed description. The file is not a Windows core file. Penusa.dll is able to record keyboard inputs. Penusa.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 84% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software publisher Microsoft provides direct support ( You could uninstall the software Microsoft Office XP or Microsoft Office Professional using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify penusa.dll related errors

Important: Some malware camouflages itself as penusa.dll. Therefore, you should check the penusa.dll 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

Used with MS Office
This exe allows me to switch between Germand and English keyboards.
Somehow associated with Microsoft Office Publisher. I was hit by the Israel Worm recently but a deep clean removed most of (but perhaps not ALL) of it's components. If you have been wormed lately, see if Office Publisher seems a bit more...menacing.
Can I delete this if in usewith MSOffice Publisher in Chinese

Summary: Average user rating of penusa.dll: based on 2 votes with 4 user comments. One user thinks penusa.dll is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. 3 users don't grade penusa.dll ("not sure about it").

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Best practices for resolving penusa issues

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

penusa.dll [all]