English | Deutsch

What is w3wp.exe?

W3wp.exe is a executable file (a program) within Windows. The filename extension .exe denotes an executable file. You should only run executable files from publishers you trust, because executable files can potentially change your computer settings or harm your computer. The free file information forum can help you determine if w3wp.exe is a virus, trojan, spyware, or adware that you can remove, or a file belonging to a Windows system or to an application you can trust.

W3wp.exe file information

The process known as IIS Worker Process belongs to software Internet Information Services or ISS Application Pool Process or Network SSL ODBC by Microsoft (www.microsoft.com).

Description: The original w3wp.exe is an important part of Windows and rarely causes problems. The file w3wp.exe is located in a subfolder of C:\Windows\System32 or sometimes in a subfolder of "C:\Program Files". Known file sizes on Windows 7/XP are 7,168 bytes (78% of all occurrences), 19,968 bytes, 6,656 bytes or 20,480 bytes. http://www.file.net/process/w3wp.exe.html 
W3wp.exe is a Windows system file. The program has no visible window. W3wp.exe is a trustworthy file from Microsoft. Therefore the technical security rating is 3% dangerous, however also read the users reviews.
If you run into problems with w3wp.exe, you can completely remove Microsoft Data Access (Control Panel⇒Add/Remove programs).

Recommended: Identify w3wp.exe related errors

If w3wp.exe is located in the folder C:\Windows\System32, the security rating is 84% dangerous. The file size is 48,128 bytes (40% of all occurrences), 57,344 bytes or 798,208 bytes. The file is a file without information about the developer of this file. The program has no visible window. The file is located in the Windows folder, but it is not a Windows core file. W3wp.exe is not a Windows system file. The software uses ports to connect to a LAN or the Internet. W3wp.exe is able to hide itself and monitor applications.

Important: Some malware camouflages itself as w3wp.exe, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the w3wp.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

Es bueno
  Alicia LuĂ©vano  
This is used by IIS to launch .net application pool processes
W3wp.exe is used to run server-side executables. Without this, server side process will not run. You should see one of these w3wp.exe instances for each appliation pool you have defined in IIS 6.0 or higher.
  EdFromOhio   (further information)
It's well documented as an IIS application pool file manager
Sometimes, if the CPU utilization goes high, for example, 70% or 80%, restart the IIS service and the WWW service. that will bring down the CPU utilization.
Teil des IIS
Normally uneccessary unless running a IIS. A bad W3WP starts itself, can be found and disabled in taskmanager. Was found on a non-updated/non-patched XP X64 sp1 edge honeypot. 8hours ago it wasn't running, since then I have recieved 3 phonecalls from "VirtualPCDoctor.com". The first was fielded by my assistant. They hung up. The second, I handled and informed them that I run a PC maintenance firm. They hung up. The third time they phoned I informed them that the only PC that I had connected to the internet was my edge honneypot, (used to identify and collect malware). He hung up.
w3wp.exe normally lives in the windows\system32\inetsrv directory
  mickeyding   (further information)
W3WP.exe - It is used to allow specific web based apps, ie TLC etc, to connect to Oracle databases via a session that oracle manages. It then allows data to be passed in both directions allowing users to view data and input data via a web client browser interface.
  M Netley  
It's server side spyware, trash used to spy and access
  kwadrat   (further information)
to stop this exe just restart IIS server
  Rizwan Khan  

Rating chart

Summary: Average user rating of w3wp.exe: based on 21 votes with 12 user comments.
12 users think w3wp.exe is essential for Windows or an installed application. 7 users think it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks w3wp.exe is dangerous and recommend removing it. 2 users don't grade w3wp.exe ("not sure about it").

Do you have additional information?
What do you know about w3wp.exe: 
How do you rate it: 
Link for more info's: 
Your Name: 

W3wp scanner

Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.

Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.

SpeedUpMyPC scans, cleans, repairs and optimizes your computer.

Other processes

w3wp.exe [all]