What is dmwu.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 dmwu.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 dmwu.exe related errors

Dmwu.exe file information

Windows Task Manager with dmwu
Dmwu.exe process in Windows Task Manager

The process known as IBUpdaterService or WebOptimizer belongs to software Updater Service or IBUpdaterService by Perion Network or IncrediMail (

Description: Dmwu.exe is not essential for Windows and will often cause problems. The dmwu.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 1,156,400 bytes (13% of all occurrences), 1,008,496 bytes and 23 more variants. 
There is no description of the program. The program is not visible. The file has a digital signature. Dmwu.exe is not a Windows system file. Dmwu.exe is a Verisign signed file. The application listens for or sends data on open ports to a LAN or the Internet. Dmwu.exe is able to monitor applications. Therefore the technical security rating is 50% dangerous, however you should also read the user reviews.

Recommended: Identify dmwu.exe related errors

Important: Some malware also uses the file name dmwu.exe, for example not-a-virus:WebToolbar.Win32.Perinet.d (detected by Kaspersky), and Win32:PUP-gen [PUP] or Win32:Malware-gen (detected by Avast). Therefore, you should check the dmwu.exe process on your PC to see if it is a threat. If IBUpdaterService has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

dmwu.exe is part of browser hijacker by incredimail
  RJ Nieland  
Probleme ein nach dem anderen und keine Lösung.
  Diener Lidija  
Datei hat sich unbemerkt und unerwünscht eingeloogt.
Wenn sie ein Kaspersky haben, und ein dmwu.exe auftritt, sollten sie schnellstens den Prozess von dmwu.exe beenden, da Kaspersky denkt, dass es sich um einen Schädling handelt. Dadurch verbraucht Kaspersky bis zu 99.9% der CPU-Auslastung. Beenden sie Kaspersky und dmwu.exe. Dann öffnen sie Kaspersky wieder und aktivieren den Schutz wieder. Jetz sollte ihr PC wieder schnell laufen.
It comes with the sweetpacks virus
  C. Morse  
ich kann nicht am computer weil immer dmwu.exe erscheint
keine Ahnung, aber es nervt, daß immer die Anzeige "melden. . ." kommt
  Susanne Beckmann  
I know,How to uninstall,at booting,enter bios,disable disk boot protection,save and exit,boot up,when you get your desktop,go start, open control panel and firewall,find excluding files,tick off,remove dmwu.After go search, find dmwu.exe,and delete. I did so in my XP.your next boot dont forget,get in bios,and reset your disk protection,save and exit,when your XP starts will operate without dmwu.wishyou all safe surfing.
It's being executed by IBUpdater. I can't find this one, but I did manage to clear it out by having better reflexes than my PC :) Go to windows taskmanager at processes tab. Typ dmwu.exe - Youll find it's often using alot of processing capacity, which is causing your PC to slow down. Now in mean time you should have windows- system32- dmwu.exe selected in your C:/ driver. Now the reflex game begins, tell taskmanager to close the process dmwu.exe this gives you about 2 seconds to delete it without getting the message it's being used. It hasnt returned eversince for me but I still recommend to install Spyhunter4 or Kaspersy to delete the related files from your system. IBUpdater is located in the services tab of taskmanager you could also try shutting this down first if you wanna buy some more time to delete dmwu.exe
  Jeremy Koster  

Rating chart

Summary: Average user rating of dmwu.exe: based on 9 votes with 9 user comments. 2 users suspect danger. 7 users think dmwu.exe is dangerous and recommend removing it. 2 users don't grade dmwu.exe ("not sure about it").

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Best practices for resolving dmwu issues

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

dmwu.exe [all]