What is AdobeReader.dll?

The genuine AdobeReader.dll file is a software component of Adobe Acrobat by Adobe Systems.
AdobeReader.dll is a DLL (Dynamic Link Library) file that is part of Adobe Acrobat, a group of software and web services created by Adobe, to create, view, modify and print files in the Portable Document Format (PDF). DLL files store data, code and resources needed by one or more programs in order to function correctly. This is not a critical Windows component and should be removed if known to cause problems. Adobe Acrobat comes bundles with Reader (formerly Acrobat Reader), a freeware tool that can view, print and annotate PDF files; Acrobat (formerly Acrobat Exchange), a paid software that can create PDF documents; and, a file hosting service. Adobe Systems Incorporated is an American software giant that develops software products for web design, video editing, web hosting, image editing, servers, as well as formats such as Flash and PDF. The company was established in 1982 by Charles Geschke and John Warnockin and is currently headquartered in San Jose, California.

AdobeReader stands for Adobe Acrobat Reader Dynamic Link Library

AdobeReader.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about Adobe Portable Document Viewer.

Click to Run a Free Scan for AdobeReader.dll related errors

AdobeReader.dll file information

The process known as For viewing and printing Adobe Portable Document Format (PDF) belongs to software Adobe Reader by Adobe ( or Adobe Systems (

Description: AdobeReader.dll is not essential for the Windows OS and causes relatively few problems. AdobeReader.dll is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 543,232 bytes (50% of all occurrences), 542,208 bytes or 198,656 bytes. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include 147FEC3F-6DE9-437C-8FC1-6B8A20AA0A72 or AC6401E9-813B-46DA-B06F-A4FFA2F9AE6D or 8C99B695-830A-49A7-BC91-851F96DD2846 or ABBBDB99-FD20-4E38-A2DE-18D9BB2948CC or C38E40BD-AF96-4006-8EED-B2F41315CEB9. The program has no visible window. The file is able to monitor web browsers. AdobeReader.dll is not a Windows system file. The service has no detailed description. Therefore the technical security rating is 64% dangerous.

Recommended: Identify AdobeReader.dll related errors

If AdobeReader.dll is located in a subfolder of "C:\Program Files", the security rating is 63% dangerous. The file size is 543,232 bytes (25% of all occurrences), 192,512 bytes, 193,024 bytes or 198,656 bytes. The program is not visible. The AdobeReader.dll file is able to monitor web browsers. AdobeReader.dll is not a Windows core file. There is no information about the author of the file.

Important: Some malware camouflages itself as AdobeReader.dll. Therefore, you should check the AdobeReader.dll process on your PC to see if it is a threat. If Adobe Portable Document Viewer has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


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Best practices for resolving AdobeReader issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active AdobeReader process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the AdobeReader.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

AdobeReader.dll [all]