What is dwwin.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 dwwin.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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Dwwin.exe file information

Windows Task Manager with dwwin
Dwwin.exe process in Windows Task Manager

The process known as Microsoft Application Error Reporting belongs to software Microsoft Application Error Reporting or Sistema operacional Microsoft Windows by Microsoft (

Description: The original dwwin.exe from Microsoft is an important part of Windows, but often causes problems. The file dwwin.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 180,224 bytes (85% of all occurrences), 200,704 bytes, 130,048 bytes or 176,128 bytes. 
It is a Windows core system file. The file is a Microsoft signed file. Dwwin.exe is able to monitor applications. Therefore the technical security rating is 5% dangerous, however you should also read the user reviews.

Recommended: Identify dwwin.exe related errors

Viruses with the same file name

Is dwwin.exe a virus? No, it is not. The true dwwin.exe file is a safe Microsoft Windows system process, called "Microsoft Application Error Reporting". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are e.g. Trojan.Win32.Agent.aihbg (detected by Kaspersky), and Mal/Generic-S (detected by Sophos).
To ensure that no rogue dwwin.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants? If dwwin.exe is located in a subfolder of the user's profile folder, the security rating is 84% dangerous. The file size is 134,656 bytes. There is no file information. The program is not visible. The process starts when Windows starts (see Registry key: RunOnce, User Shell Folders, Run). It is not a Windows system file. Dwwin.exe is able to monitor applications.

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

its a keylogger
it's a CPU hog
i need full information for dwwin.exe-dll
  Javeed Ahamed.J  
Error Sender
  Martin Luft  
it stopped Linked items (eg My documents set as links from starting) in Start menu
  John V  
I find it in Task manager processes and it takes a big cpu usage.
Once my firewall told me that system process is accessing some ip location via protocol 41 . So I made IP search to know the receipient of this information . It was pointing to microsoft usa . I blocked it. Again it gave another message now the IP address was changed a bit now it was microsoft UK . So I blocked it . This way it tried 4 -5 times. Then on next boot it restarted the boot . After it gives message that windows has recovered from a serious error Do you want to send error report. on selecting no this message comes again . Only way to stop this is drag it to a corner of window
dwwin.exe is a part of the Microsoft Doctor Watson error reporting tool which comes packaged with some Microsoft products. This program is important for the stable and secure running of your computer and should not be terminated.
It's the Windows Dr. Watson service
I found this file in c\windows\prefetch. I don't know what to think of it.
Microsoft application error reporting. Not dr.watson. Related in my opinion with hard drives or usb drives that ejected but os still searching for them. or for general errors.
  XP Hell  
all I know is it keeps crashing which makes other programs on my computer crash.
  Morley McFrustrated  

Rating chart

Summary: Average user rating of dwwin.exe: based on 16 votes with 12 user comments. 5 users think dwwin.exe is essential for Windows or an installed application. 6 users think it's probably harmless. One user thinks it's neither essential nor dangerous. 2 users suspect danger. 2 users think dwwin.exe is dangerous and recommend removing it. 5 users don't grade dwwin.exe ("not sure about it").

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Best practices for resolving dwwin issues

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

dwwin.exe [all]