What is HTTP?

HTTP.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if HTTP.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for HTTP drivers in need of updating

HTTP.sys file information

The process known as HTTP Protocol Stack belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original HTTP.sys is an important part of Windows and rarely causes problems. HTTP.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 263,040 bytes (30% of all occurrences), 262,784 bytes, 265,728 bytes, 385,536 bytes or 264,832 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. HTTP.sys is a Windows system file. The program has no visible window. HTTP.sys is a Microsoft signed file. HTTP.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Recommended: Identify HTTP.sys related errors

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

Sutdown (Einschalten)
  mario bauer  
When we create an HTTP end point, it get registered with http.sys, bypassing the IIS.We do not need IIS for creating HTTP end points
It's part of the Windows network protocol stack used to funnel HTTP browser requests
  Heidi   (further information)

Summary: Average user rating of HTTP.sys: based on 3 votes with 4 user comments. 2 users think HTTP.sys is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. 3 users don't grade HTTP.sys ("not sure about it").

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Best practices for resolving HTTP issues

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

HTTP.sys [all]