What is sens.dll?
The genuine sens.dll file is a software component of Microsoft Windows Operating System by Microsoft.
The System Event Notification Service is provided by the SENS.dll DLL file. SENS is a Windows 7 service monitoring system events and notifying subscribers to COM+ Event System of the events.
SENS stands for System Event Notification Service (SENS)
Sens.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 sens.dll is a Windows system file or if it belongs to an application that you can trust.
Click to Run a Free Scan for sens.dll related errors
Sens.dll file information
The process known as System Event Notification Service (SENS) belongs to software Microsoft Windows Operating System or System Event Notification Service (SENS) by Microsoft (www.microsoft.com).
Description: Sens.dll is not essential for the Windows OS and causes relatively few problems. Sens.dll is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/11/7 are 39,424 bytes (50% of all occurrences), 49,664 bytes or 47,104 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs.
The program has no visible window. It is a trustworthy file from Microsoft. The file is not a Windows system file.
Therefore the technical security rating is 5% dangerous; but you should also compare this rating with the user reviews.
Recommended: Identify sens.dll related errors
Important: Some malware camouflages itself as sens.dll, for example Virus:Win32/Mesoum.D (detected by Microsoft), and PE_PATCHED.AADL (detected by TrendMicro). Therefore, you should check the sens.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.
Best practices for resolving sens issues
A clean and tidy computer is the key requirement for avoiding problems with sens. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the sens.dll 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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
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Score
User Comments
Summary: Average user rating of sens.dll: based on 1 vote with 1 user comment. One user thinks sens.dll is essential for Windows or an installed application.