What is 7-zip.dll?

7-zip.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. You can fix your 7-zip.dll problem by downloading the correct 7-zip.dll file. The following information can help you determine if 7-zip.dll is a Windows system file or if it belongs to an application that you can trust.

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7-zip.dll file information

The process known as 7-Zip Shell Extension belongs to software 7-Zip 9.25 alpha or System Migration Assistant by Igor Pavlov (

Description: 7-zip.dll is not essential for the Windows OS and causes relatively few problems. 7-zip.dll is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of C:\ or in a subfolder of the "My Files" folder or in a subfolder of "C:\Program Files\Common Files". Known file sizes on Windows 8/7/XP are 69,632 bytes (34% of all occurrences), 138,752 bytes and 14 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. The program has no file description. The program is not visible. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. The file is not a Windows core file. Therefore the technical security rating is 70% dangerous, however you should also read the user reviews.
In case of problems with 7-zip.dll, you can also visit the support page, update to a possibly corrected version or uninstall 7-Zip or 7-Zip 9.30 alpha from your computer using the Control Panel applet "Add/Remove programs".

Recommended: Identify 7-zip.dll related errors

Important: Some malware camouflages itself as 7-zip.dll. Therefore, you should check the 7-zip.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.


User Comments

It's a dll from the compression 7Zip program, It's a more powefull zip, I don't know what that dll do
looks like extension file from 7-Zip
Great tool for unpacking .zip, .rar etc.
  Kjeld   (further information)
probably the result of installing the 7-zip file archiver...
  jodelhobel   (further information)
Belongs to the Free File Archiver 7Zip. This is for integration in the Kontext-Menu
part of 7zip program which adding some commands in right-click menu
7-zip Shell Extension
  Alex M.   (further information)
I got it with a zip program, but i cant delete the .dll file! If i can isolate the system process I can delete it, but it doesnt show up there.
Safe, used in 7-Zip program.
  Jordan S.   (further information)
7-zip.dll is a core component of 7-Zip, the well-known and OPEN SOURCE file archiver application for Windows. Its open source, idiots, and has NO reported malware, therefore should be regarded as not "essential" but quite useful and completely safe. By comparison, Windows itself is a deathtrap. God almighty you folks are total tards. I use 7-Zip on 8 Windows machines and wouldn't imagine not having it installed (due to windows brain damaged zip capability).
  Stuffit, tard. This site is lame.   (further information)
used for windows shell right click window .. check [HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\7-Zip] @="{23170F69-40C1-278A-1000-000100020000}" then check this [HKEY_CLASSES_ROOT\CLSID\{23170F69-40C1-278A-1000-000100020000}] @="7-Zip Shell Extension" ,well i know becouse i tring to modify it
  Constantin ,razvan_bc  
I downloaded 7-zip. So many others rated it hightly, It also download about six other programs at the same time. Diffifcult to remove those unnessary those six. I do not trust 7-zip.dll just because you can not remove the thing even after deleting the 7-zip program. Go figure? Harmless? I say not harmless.
  Robert K.  

Rating chart

Summary: Average user rating of 7-zip.dll: based on 25 votes with 13 user comments. 15 users think 7-zip.dll is essential for Windows or an installed application. 3 users think it's probably harmless. 4 users think it's neither essential nor dangerous. 2 users suspect danger. One user thinks 7-zip.dll is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving 7-zip issues

A clean and tidy computer is the key requirement for avoiding problems with 7-zip. 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 doing a repair of your installation, or in the case of Windows 8, 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 7-zip.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

7-zip.dll [all]