What is mdmcls32.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the mdmcls32.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Mdmcls32.exe file information

Windows Task Manager with mdmcls32
Mdmcls32.exe process in Windows Task Manager

The process known as ClassificationService Module belongs to software WinSock Extention Manager or ClassificationService Module by PureSight Technologies ( or PureSight.

Description: Mdmcls32.exe is not essential for the Windows OS and causes relatively few problems. Mdmcls32.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 1,212,416 bytes (57% of all occurrences), 2,347,760 bytes and 6 more variants. 
There is no file information. The program is not visible. The file is not a Windows system file. It is located in the Windows folder, but it is not a Windows core file. Mdmcls32.exe is able to monitor applications and connect to the Internet. Therefore the technical security rating is 63% dangerous, however you should also read the user reviews.

Uninstalling this variant: In case of any problems with mdmcls32.exe, you can search the support area on the Puresight website or completely remove PureSight Technologies Ltd (Control Panel ⇒ Uninstall a Program).

Recommended: Identify mdmcls32.exe related errors

If mdmcls32.exe is located in a subfolder of C:\Windows, the security rating is 48% dangerous. The file size is 3,207,184 bytes (33% of all occurrences), 2,347,760 bytes, 1,212,416 bytes or 2,339,568 bytes. The program has no file description. The program is not visible. Mdmcls32.exe is not a Windows core file. The file has a digital signature. Mdmcls32.exe is able to monitor applications and connect to the Internet.

Important: Some malware disguises itself as mdmcls32.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the mdmcls32.exe 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

yes its puresight software to filter internet
CA security center bibliothek
  AGA   (further information)
This file is associated with CA Parental Controls application. I installed CA's 2009 Internet Security Suite which includes the Parental Controls application and this message started popping up. I uninstalled the Parental Controls and the error went away.. I found this information on the web when I googled the mdmcls32.exe error.
If you have CA and msmcls32.exe won't let you connect to the internet, i recommend that you uninstall CA Parental Controls
It eats alot of memory.
is there suppose to be two instances of this file running? one instance little information for example command line or virtualization. information. my computer is sluggish i end the process that contains no data and the computer runs great again.
A free virus remover I am currently using has info revealing mdmcls32.exe as SUSPICIOUS and having a pathway of c:\windows\system32\svcprs32.exe, no product name, no company name, a legal copyright of 2008, a file version of 6.2.2046. I do not know if it is a "false positive" or if it' e-v-i-l.
File mdmcls32.exe may be part of CAISS -- the CA Internet Security Suite security program. File version is 6.2.2046.0 and size is 2.23 MB.
  the one male  
I also have the ca program my pc is freezing. I am going to delete the parental controls as suggested and see what happens.
A file that remained after I rid my system of a CA Internet Security Suite that refused to uninstall properly. It is more of a pain than a real threat. Filters out harmless sites. Its refusal to uninstall makes it seem dangerous to me. I had to install a process monitoring software to locate it.
  Robert Allen  

Rating chart

Summary: Average user rating of mdmcls32.exe: based on 6 votes with 10 user comments. 3 users think mdmcls32.exe is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user suspects danger. 4 users don't grade mdmcls32.exe ("not sure about it").

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Best practices for resolving mdmcls32 issues

A clean and tidy computer is the key requirement for avoiding problems with mdmcls32. 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 mdmcls32.exe 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

mdmcls32.exe [all]