Download and Fix comcat.dll

Sometimes Windows system displays error messages regarding corrupted or missing comcat.dll files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent comcat.dll file can therefore effect in failed execution of the started process.

comcat.dll file Microsoft Component Category Manager Library. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of comcat.dll related errors on your device. You can also download comcat.dll file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7, Windows Vista, Windows Vista, Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7, Windows Vista, Windows Vista, Windows XP

File info

General information
Filename comcat.dll
File extension DLL
Description Microsoft Component Category Manager Library
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
MIME type application/octet-stream
File type Dynamic link library
System Windows NT 32-bit
Copyrights © Microsoft Corporation. All rights reserved.
Character set Unicode
Language cod English (U.S.)

There are various types of errors related to comcat.dll file. comcat.dll file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to comcat.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • comcat.dll is corrupted
  • comcat.dll cannot be located
  • Runtime Error - comcat.dll
  • comcat.dll file error
  • comcat.dll file cannot be loaded. Module was not found
  • cannot register comcat.dll file:
  • comcat.dll file could not be loaded
  • comcat.dll file doesn't exist



Application could not be started because comcat.dll file is missing. Reinstall the application to solve the problem.


Problems related to comcat.dll can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing comcat.dll file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

comcat.dll file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with comcat.dll file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to comcat.dll file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of comcat.dll or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to comcat.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the comcat.dll file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the comcat.dll file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the comcat.dll file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace comcat.dll file

The last solution is to manually download and replace comcat.dll file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded comcat.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of comcat.dll file example directory paths.

  • Windows 10: C:\Windows\System32\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8: 1: C:\Windows\System32\
  • Windows 7: C:\Windows\SysWOW64\
  • Windows 7: C:\Windows\SysWOW64\
  • Windows Vista: ---
  • Windows Vista: ---
  • Windows XP: ---

If the steps did not solve your comcat.dll file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename comcat.dll
System Windows 10
File size 8704 bytes
Date 2017-03-18
File details
MD5 5884dcfa372b693c4d4db74924a0c769
SHA1 8f3709ec7c1e8a73fd1ae1362efce51f1939bf77
SHA256 2d2007a0f6778605f1bb17b3efca9293f1c560b8c2a9a5fdcbbdc1b2ec9f7c57
CRC32 2c55a94d
Example file location C:\Windows\System32\
Filename comcat.dll
System Windows 8.1
File size 8192 bytes
Date 2014-11-21
File details
MD5 73adb3c5031483bb5944dc659ed77284
SHA1 ccefe3c0e97f35a16fcd65a0049a68fdab839a11
SHA256 156900991b7c832fb0c1d978945dc0ac2ddd87f728644bb31e3777b36cbaa489
CRC32 0d515a91
Example file location C:\Windows\System32\
Filename comcat.dll
System Windows 8
File size 8192 bytes
Date 2012-07-26
File details
MD5 ecbf2ec6884dc52b25ace19d8f67f3ca
SHA1 901367edf790c18a4cffb09900c0969249090f3e
SHA256 93be427639dafaa7d5ef3a30bcfb63b76c26998c7b3270183ae591af1b0d81b6
CRC32 3860bf30
Example file location 1: C:\Windows\System32\
Filename comcat.dll
System Windows 7
File size 7168 bytes
Date -0001-11-30
File details
MD5 1e98d239010c9500cc9cc738100f5578
SHA1 9c5534be4ec98574207e79f2e561bc58a61c8163
SHA256 0becfe478299d21210ba3d809a45496c494306e6f4228c2a892b4269dc35c8d8
CRC32 a169154c
Example file location C:\Windows\SysWOW64\
Filename comcat.dll
System Windows 7
File size 8704 bytes
Date 2009-07-14
File details
MD5 929bafc30ae90d2f38bed71ea355cbae
SHA1 813743fd726ce5d6c1383689c7cc7267bf100a32
SHA256 6b81d20e236cdc896e0f6af6082aa217fe6b1e26c1825c5103059af9fba1569f
CRC32 e98607a3
Example file location C:\Windows\SysWOW64\
Filename comcat.dll
System Windows Vista
File size 8704 bytes
Date 2006-11-02
File details
MD5 1124d020bb3b08bffed290d2057e65f8
SHA1 0e255a63dc0e58ebbbaf8deeb35d84b1109b6557
SHA256 4b111bf153114c74d191e93f442a7929cf2c35b3f49cc4170705741ef9f78b4a
CRC32 1d540b58
Example file location ---
Filename comcat.dll
System Windows Vista
File size 7168 bytes
Date -0001-11-30
File details
MD5 e2f8e6a62013071b07aa8c5bbcf22a4e
SHA1 606e8add9f7b1078f3946301c9dda0688c6b7f9d
SHA256 911762e082c7ea8c47c1d7876883ca4c125a06d0a0f227ea5b171fd76520ecae
CRC32 6d5cee7f
Example file location ---
Filename comcat.dll
System Windows XP
File size 3584 bytes
Date 2008-04-14
File details
MD5 ffad3f4edff2d549b5966f59ccf8389b
SHA1 f8e72e5e58ebc688079bfaf9abd071463587567f
SHA256 3deaa18a5063dc1b2f4a12a7e52a13e6c8864b40e68b514d2f1cbd4348d58eb9
CRC32 8c5d1809
Example file location ---