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What does the w3wp.exe file do?

The w3wp.exe process is also known as IIS Worker Process and is a part of Internet Information Services. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of w3wp.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about w3wp.exe IIS Worker Process

w3wp.exe is part of Windows. The file w3wp.exe is found in a subdirectory of C:\Windows\System32. Frequently occurring are file sizes such as 7,168 bytes (40% of all these files), 19,968 bytes, 20,992 bytes or, as the case may be, 21,504 bytes.
The w3wp file is part of the operating system. The file has been digitally signed by Microsoft itself to guarantee its authenticity. The program executes in the background, and can only be terminated using Windows Task Manager. For this reason, 2% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves w3wp.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about w3wp?

Es bueno
Alicia Luévano
This is used by IIS to launch .net application pool processes
Bryan
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. (further information...)
EdFromOhio
It's well documented as an IIS application pool file manager
none
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.
Vijay

Summary: 11 users judge w3wp.exe to be an essential file that should not be touched. 7 users consider it harmless. For this reason, one user has already deleted w3wp.exe. source: file.net

How to uninstall Internet Information Services

w3wp.exe  IIS Worker Process fix

To remove IIS Worker Process from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Internet Information Services in the list of available programs.
  5. Click Uninstall.

How to tell if w3wp.exe (IIS Worker Process) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of IIS Worker Process. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for IIS Worker Process or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or w3wp.exe is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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