What is UdfReadr?

UdfReadr.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 UdfReadr.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for UdfReadr drivers in need of updating

UdfReadr.sys file information

The process known as CD-UDF NT Filesystem Reader Driver belongs to software Drag-to-Disc or DirectCD or Roxio Easy Media Creator (version 7) by Roxio ( or Sonic Solutions (

Description: UdfReadr.sys is not essential for the Windows OS and causes relatively few problems. The file UdfReadr.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 202,496 bytes (37% of all occurrences), 206,464 bytes, 206,208 bytes, 206,336 bytes or 200,832 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. It is not a Windows system file. UdfReadr.sys appears to be a compressed file. Therefore the technical security rating is 38% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you are having problems with UdfReadr.sys, you can also safely remove the program using the uninstall program of Roxio Easy Media Creator 7 (Control Panel ⇒ Uninstall a Program).

Recommended: Identify UdfReadr.sys related errors

Important: Some malware disguises itself as UdfReadr.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the UdfReadr.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.


User Comments

Windows XP has labelled this file as "OBSOLETE" used in "DIRECTCD" by Roxio
Per MS, error report after BSD -problem was caused by Roxio's UDF Reader (udfreadr.sys). Roxio's UDF Reader (udfreadr.sys) was created by Roxio, Inc..
  Jim Sharp  
Windows XP advise me that udreadr.sys was the problem
when i start my computer i dont cant and after i have that message error
  Claude Mignault  

Summary: Average user rating of UdfReadr.sys: based on 4 votes with 4 user comments. 4 users think UdfReadr.sys is essential for Windows or an installed application. 2 users don't grade UdfReadr.sys ("not sure about it").

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Best practices for resolving UdfReadr issues

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

UdfReadr.sys [all]