What is WUDFRd?
The genuine WUDFRd.sys file is a software component of Microsoft Windows Operating System by Microsoft Corporation.
"WUDFRd.sys" is the Microsoft Windows User-mode Driver Framework Reflector driver, a crucial component of the COM-based User Mode Driver Framework (UMDF). It starts at boot time and cannot be stopped. (It will not start if the "WUDFPf.sys" service is not running.) Generally, UMDF allows part of a device's driver stack to execute in user mode to reduce risk of driver failure crashing the system. Applications issue all device requests to the one "WUDFRd.sys" Reflector driver instance in kernel mode. It handles all communications between the applications and the user-mode Driver Manager's child Driver Host Processes (DHPs) hosting devices' user-mode driver stacks. (During startup, the Reflector tells the Driver Manager which DHP's it should create.) The Reflector sends an application's device request back out of kernel mode to the appropriate DHP and eventually receives a request back from the user-mode driver stack which it sends down that device's kernel-mode stack.
WUDFRd stands for Windows User-mode Driver Framework Reflector driver
WUDFRd.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc.
The free file information forum can help you determine if WUDFRd.sys is a Windows system file or if it belongs to an application that you can trust.
Run a free scan to check for WUDFRd drivers in need of updating
WUDFRd.sys file information
The process known as Windows Driver Foundation - User-mode Driver Framework Reflector belongs to software Microsoft Windows Operating System or Windows Driver Foundation - Reflektor für Benutzermodus-Treiberframework by Microsoft (www.microsoft.com).
Description: The original WUDFRd.sys is an important part of Windows and rarely causes problems. The file WUDFRd.sys is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/11/7 are 132,224 bytes (40% of all occurrences), 82,944 bytes, 155,136 bytes or 189,952 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs.
The program is not visible. WUDFRd.sys is a trustworthy file from Microsoft. The service has no detailed description.
Therefore the technical security rating is 0% dangerous, but you should also take into account the user reviews.
Recommended: Identify WUDFRd.sys related errors
Important: Some malware disguises itself as WUDFRd.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the WUDFRd.sys 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 WUDFRd issues
A clean and tidy computer is the key requirement for avoiding problems with WUDFRd. 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 WUDFRd.sys 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
afd.sys hpsmartdeviceagentbase.exe qmxnetworksync.exe WUDFRd.sys recordingmanager.exe dllsuite.exe winroll.exe mmerefresh.exe processlasso.exe psuaservice.exe nvapiw.exe [all]
Score
User Comments
Rajesh
ROH (further information)
Klaas Eldering
jorge
harsh
terry
Summary: Average user rating of WUDFRd.sys: based on 7 votes with 8 user comments. 3 users think WUDFRd.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users suspect danger. 2 users don't grade WUDFRd.sys ("not sure about it").