What is dlactrlw.exe?

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 dlactrlw.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.

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Dlactrlw.exe file information

Windows Task Manager with dlactrlw
Dlactrlw.exe process in Windows Task Manager

The process known as Drive Letter Access Component or Roxio DLA or Sonic UDF Reader belongs to software Sonic DLA or Roxio DLA or Sonic UDF Reader by Sonic Solutions ( or Roxio (

Description: Dlactrlw.exe is not essential for Windows and will often cause problems. The file dlactrlw.exe is located in a subfolder of C:\Windows\System32. Known file sizes on Windows 10/8/7/XP are 122,940 bytes (88% of all occurrences), 127,036 bytes, 487,936 bytes or 143,420 bytes. 
There is no file information. The file is not a Windows system file. The program has no visible window. The software starts when Windows starts (see Registry key: MACHINE\Run). The file is an unknown file in the Windows folder. Therefore the technical security rating is 55% dangerous; however you should also read the user reviews.

Uninstalling this variant: In case you experience problems using dlactrlw.exe, you may want to safely remove the program using the uninstall program of Sonic DLA or Roxio DLA (Control Panel ⇒ Uninstall a Program), get help from the software vendor Roxio or check the vendor’s website for a newer version.

Recommended: Identify dlactrlw.exe related errors

Important: Some malware camouflages itself as dlactrlw.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example PE_PATCHEP.B (detected by TrendMicro), and Virus:Win32/Patched.E (detected by Microsoft). Therefore, you should check the dlactrlw.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.


User Comments

most of dell computers comewith this roxio software
that it has spread across thousands of computers
  Em   (further information)
Sonic RecordNow! CD/DVD burner software
  A100 Satellite  
Unessential, in XP Pro writing cd:s will work without
Generated lock in combination with Virtual Deamon Manager 4.01
This was created when I installed Sony Picture Motion Browser
Used to delete the process when using a public computer. After a while the process was changed so that only administrator could delete it. Why?
  Cody   (further information)
Sonic drive letter, for web to cd writing, causes some issues with ie8 and Firefox
  Ahura Pandaz  
Part of Sonic RecordNow. This process appears after the installation of this program.

Rating chart

Summary: Average user rating of dlactrlw.exe: based on 14 votes with 10 user comments. 6 users think dlactrlw.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 4 users think it's neither essential nor dangerous. One user suspects danger. 2 users think dlactrlw.exe is dangerous and recommend removing it. 2 users don't grade dlactrlw.exe ("not sure about it").

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Best practices for resolving dlactrlw issues

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

dlactrlw.exe [all]