safe file



Click Here to run a FREE scan for w3isapi.dll related issues

w3isapi.dll. What is it?

The w3isapi.dll is a IIS ISAPI Handler.

This file is part of Internet Information Services. W3isapi.dll is developed by Microsoft Corporation. It’s a system and hidden file. W3isapi.dll is usually located in the %SYSTEM% sub-folder and its usual size is 62,976 bytes.


The w3isapi.dll process is safe and disabling it can be dangerous, because programs on your computer need it to work correctly.

We also recommend optimizing your computer.

Computer Speed Up

Select your operating system

General Information

Security risk: Free spyware & virus scanRegistry Errors: Free scan (run Registry Cleaner)Uninstallation: N/A Uninstall (run Unistall Manager)Disk & Memory Usage: N/A Free scan (run Task Manager)


Author: Microsoft CorporationProcess: IIS ISAPI HandlerPart Of: Internet Information ServicesCommon path(s): subfolder in %SYSTEM%Keywords(s): systemFilesize(s): 62,976 bytes

User opinions

Add your comment

No comments found

Add your comment
Your name:
Your rating:
unrated file
Characters Type the characters you see in the picture:
Show another picture

Scan Your Computer Now