What is rundl32.exe?

The genuine rundl32.exe file is a software component of W32/Agobot-TO.
Rundl32.exe has been reported as a being a trojan virus, a malicious computer program designed to infect and spread through computer networks. The worm can remotely execute programs and run commands, use a keylogger to track keyboard entries, send data across networks and spread copies of itself. Rundl32.exe is known to damage personal data by corrupting user files. It is highly recommended to use a dedicated anti-virus or anti-malware software to scan and clean the infected computer.

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 rundl32.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.

Click to Run a Free Scan for rundl32.exe related errors

Rundl32.exe file information

Windows Task Manager with rundl32
Rundl32.exe process in Windows Task Manager

The process known as OC Tuner or ffderysdadd appears to belong to software ASRock OC Tuner or std by ASRock or Microsoft (

Description: Rundl32.exe is not essential for the Windows OS and causes relatively few problems. The file rundl32.exe is located in a subfolder of C:\Windows\System32. The file size on Windows 10/8/7/XP is 101,038 bytes. 
There is no information about the author of the file. Rundl32.exe is located in the Windows folder, but it is not a Windows core file. The program has no visible window. Rundl32.exe is not a Windows system file. The software listens for or sends data on open ports to a LAN or the Internet. Therefore the technical security rating is 81% dangerous.

Recommended: Identify rundl32.exe related errors

Important: Some malware also uses the file name rundl32.exe, for example TROJ_GEN.R47CDBH (detected by TrendMicro), and Trojan-Dropper.Win32.Injector.hebh (detected by Kaspersky). Therefore, you should check the rundl32.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.


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One user thinks rundl32.exe is dangerous and recommends removing it.

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Best practices for resolving rundl32 issues

A clean and tidy computer is the key requirement for avoiding problems with rundl32. 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, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the rundl32.exe 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

rundl32.exe [all]