What is aswJsFlt.dll?

AswJsFlt.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if aswJsFlt.dll is a Windows system file or if it belongs to an application that you can trust.

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AswJsFlt.dll file information

The process known as avast! Script Blocking filter library belongs to software avast! Free Antivirus or avast! Internet Security by AVAST Software (

Description: AswJsFlt.dll is not essential for the Windows OS and causes relatively few problems. The file aswJsFlt.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 126,160 bytes (61% of all occurrences), 136,936 bytes and 4 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. It can change the behavior of other programs or manipulate other programs. The program has no visible window. The file has a digital signature. The service has no detailed description. It is not a Windows system file. The file is a Verisign signed file. AswJsFlt.dll is able to monitor applications. Therefore the technical security rating is 51% dangerous.

Uninstalling this variant: You can uninstall the program avast! Free Antivirus or avast! Internet Security, or ask the software vendor for support. Click on avast! Free Antivirus or avast! Internet Security in Windows Control Panel (Software or Programs section) to uninstall it.

Recommended: Identify aswJsFlt.dll related errors

Important: Some malware camouflages itself as aswJsFlt.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the aswJsFlt.dll 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.


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Best practices for resolving aswJsFlt issues

A clean and tidy computer is the key requirement for avoiding problems with aswJsFlt. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the aswJsFlt.dll process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

aswJsFlt.dll [all]