What is wanarp?

Wanarp.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 wanarp.sys is a Windows system file or if it belongs to an application that you can trust.

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

Wanarp.sys file information

The process known as MS Remote Access and Routing ARP Driver or Remote Access IPv6 ARP Driver or Remote Access IP ARP Driver belongs to software Microsoft Windows Operating System or IPv6 ARP-stuurprogramma voor externe toegang by Microsoft (

Description: The original wanarp.sys is an important part of Windows and rarely causes problems. The wanarp.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 34,560 bytes (81% of all occurrences), 62,464 bytes, 63,488 bytes, 61,952 bytes or 88,576 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The file is a Windows core system file. The program has no visible window. The file is a Microsoft signed file. wanarp.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 wanarp.sys related errors

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

system file in WinXP, doing arp
  Captain Haddock  
Can it be fixed?
AVG Boot time scan says virus. Have had a virus that won't let me use my current Malwarebyte's or SAS or even the AVG suite. This file is going bye bye.
hitman pro showed possible malware

Rating chart

Summary: Average user rating of wanarp.sys: based on 7 votes with 4 user comments. 6 users think wanarp.sys is essential for Windows or an installed application. One user thinks it's probably harmless. 3 users don't grade wanarp.sys ("not sure about it").

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Best practices for resolving wanarp issues

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

wanarp.sys [all]