Fix ASMLIB.DLL is missing/ not found error Step by Step

Frustrated by the ASMLIB.DLL error message? Well, you should want to know what this ASMLIB.DLL file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this ASMLIB.DLL and the methods to fix it.

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What's ASMLIB.DLL File?

As its file extension denotes, ASMLIB.DLL is a vital DLL file and it's a component of the software Assembler/Disassembler library developed by Windows Software Developer. The latest version of ASMLIB.DLL file is and MD5 value is ac3fed70d547bd63cb7ebd7a87f36f57. Assembler/Disassembler library and the Windows will generate ASMLIB.DLL error when ASMLIB.DLL file cannot be used due to the removal or corruption of ASMLIB.DLL file. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

ASMLIB.DLL file information:
File Name:   
   ASMLIB.DLL (Free Scan)
File Description:   
   Assembler/Disassembler library
Product Name:   
   Assembler/Disassembler library
Product Version:
   Windows Software Developer
File md5:   
File type:   
   dll file
Security Level(0-5):   
OS Infected:   
   Download ASMLIB.DLL Error Free Scan Tool

Why Do I Receive ASMLIB.DLL Error?

Dynamic Link Libraries (also called as DLL) are similar to EXE files, though they are not directly executable. A DLL is a library which contains code and data which can be used by many programs simultaneously. To reduce disk space and speed up the performance, not all DLL files are loaded with Windows. When a program needs a DLL, that file will be loaded and run.

For example, most computer programs needs to create the graphical interface which appears on the screen. So when they need to create the interface, they just call on a DLL for that functionality rather than having to contain the code in the program. So, when ASMLIB.DLL file is not correctly loaded and run, the program and the Windows will pop up error messages.

Popular ASMLIB.DLL Error Messages

  • The application has failed to start because ASMLIB.DLL was not found. Re-installing the application may fix this problem.
  • The program can't start because ASMLIB.DLL is missing from your computer. Try reinstalling the program to fix this problem.
  • ASMLIB.DLL failed. The specified module could not be found.
  • File not found: ASMLIB.DLL.
  • Failed to load library 'ASMLIB.DLL'.
  • Access violation in module 'ASMLIB.DLL'.
  • Component 'ASMLIB.DLL' or one of its dependencies not correctly registered a file is missing or invalid.

You may receive ASMLIB.DLL error when you run or close Assembler/Disassembler library, start or shut down the computer, or use specific function of Assembler/Disassembler library. The time you encounter the error is very important to troubleshoot the problem.

Causes of ASMLIB.DLL Error

ASMLIB.DLL error can be caused by plenty of reasons. The following are the most common causes of ASMLIB.DLL error.

  • The latest version of ASMLIB.DLL file is overwritten by a previous version installed by another newly-installed program.
  • There is a malfunctioning or faulty hardware in your computer.
  • ASMLIB.DLL file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of ASMLIB.DLL are corrupted in the registry.
  • ASMLIB.DLL file that is still used by other programs is uninstalled by another program.

How to Fix ASMLIB.DLL Error?

Keep in mind, never download DLL files from DLL download websites, because they are not verified by their developers and may contain malicious code which lead to further damage to your computer system. We have listed several solutions to troubleshoot your ASMLIB.DLL problem.

Method 1: Manually register ASMLIB.DLL file.

When a program uses a DLL function in another DLL, a dependency is created. As a result, the program is no longer dependent, and it may have problems if the dependency with the DLL is broken or corrupted. To fix such error, we can use re-register ASMLIB.DLL file.


a. Open an elevated command prompt.

Windows Vista and Windows 7

Click Start, click All Programs, Accessories, and then right click Command Prompt and click Run as administrator.

command prompt windows 7

Windows 8, Windows 8.1 and Windows 10

Open Win X menu by holding Windows and X keys, and then click Command Prompt (Admin).

windows8 win x menu

b. After confirming the UAC prompt, type regsvr32 /u ASMLIB.DLL in the Command Prompt and hit Enter. This will un-register ASMLIB.DLL file.

c. Then type regsvr32 /i ASMLIB.DLL in the Command Prompt and hit Enter. This will re-register ASMLIB.DLL file.

d. Restart your software to see if the error is fixed.

Method 2: Uninstall and then reinstall Assembler/Disassembler library causing ASMLIB.DLL error.

If ASMLIB.DLL error pops up when you're using Assembler/Disassembler library, then it's worth trying to reinstall Assembler/Disassembler library or the program from Windows Software Developer.


Windows Vista, Windows 7 and Windows 10:

a. Click Start and click Control Panel.

start control panel windows 7

b. Click Uninstall a program.

win7 control panel programs and features

c. Look for Assembler/Disassembler library or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Windows 8 and 8.1:

a. Hover the cursor to the top right corner of the screen to bring up Charms bar and then click Search.

windows 8 charms bar search

b. Click Settings, type uninstall, and click Uninstall a program in the search results.

uninstall windows8

c. Look for Assembler/Disassembler library or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software windows8

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Method 3: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like ASMLIB.DLL error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, Assembler/Disassembler library and Windows becomes more prone to ASMLIB.DLL error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 4: Look for deleted ASMLIB.DLL file.

When Assembler/Disassembler library and the Windows cannot find ASMLIB.DLL file, it will tell you that ASMLIB.DLL is missing or not found. As a result, try your luck to see if ASMLIB.DLL is in the Recycle Bin.


a. Double click on the Recycle Bin icon on your desktop to open it.

b. Search thru all deleted files there and look for the ASMLIB.DLL file.

c. If it's found, then right click on it and click Restore.

restore file

What can you do if the Recycle Bin has been emptied? Try to use a file recovery tool to help you recover the file.

Method 5: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like ASMLIB.DLL error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

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Does ASMLIB.DLL error still persist?

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