What is aswRdr?

The genuine aswRdr.sys file is a software component of avast! Antivirus System by ALWIL Software.
A device driver for the Avast! Antivirus Suite, this process starts with Windows and runs in the background. Avast is a free antivirus that can be purchased for more advanced features. Currently, Avast has over 17% of the world markey share for antivirus software. Originally founded in 1991, Avast Software is located in Prague, Czech Republic, but has offices all over the world.

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

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

AswRdr.sys file information

The process known as avast! TDI RDR Driver or avast! TDI Redirect Driver belongs to software avast! Antivirus System or avast! Antivirus by ALWIL Software ( or AVAST Software (

Description: AswRdr.sys is not essential for Windows and will often cause problems. AswRdr.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 23,152 bytes (30% of all occurrences), 23,376 bytes and 4 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The aswRdr.sys file is not a Windows core file. There is no detailed description of this service. AswRdr.sys is a Verisign signed file. The file has a digital signature. aswRdr.sys appears to be a compressed file. Therefore the technical security rating is 19% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software publisher Avast provides an uninstall program (Control Panel->Software->Avast! Antivirus).

Recommended: Identify aswRdr.sys related errors

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

100% ceretain it is NOT GOOD. When it trys to access the computer at any time (Avast doesn't need it) It will then examine and download Trojan Vundo(Virtuemunde) which in itself has a trojan downloader, Many people simply cannot get rid of this (Safemode useless) because it needs advanced knowledge to do so as the new version can alter many anti malware programmes reg cleaner for the .dll's are also useless against it, as they return perhaps under another. For most the best option is a re-install - again this is a possible waste of time because your ip is now known and cvontinuous attempts w
It is made by a well trusted anti-virus company and is probably the safest file out there, It's safe and in no way dangerous.

Rating chart

Summary: Average user rating of aswRdr.sys: based on 10 votes with 2 user comments. 3 users think aswRdr.sys is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users think it's neither essential nor dangerous. 3 users suspect danger. One user thinks aswRdr.sys is dangerous and recommends removing it.

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Best practices for resolving aswRdr issues

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

aswRdr.sys [all]