How to remove the MsVCL1 Module malware

Some anti-malware programs classify altcmd32.dll as a harmful extension to Internet Explorer: e.g. TROJ_CEFYNS.A or TROJ_FAKEAVAL.AC (detected by TrendMicro), and Trojan.Win32.BHO.ipl or Trojan.Win32.Dialer.bps (detected by Kaspersky). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated MsVCL1 Module software, it's no surprise. In most cases, this kind of adware is installed on the side when you install a freeware product like a Youtube Downloader or a PDF Converter. In the following selection, you can read more about MsVCL1 Module and how to get rid of it.

Click here to automatically remove the MsVCL1 Module malware

Altcmd32.dll file information

The process known as MsVCL1 Module appears to belong to software altcompare or MsVCL1 Module by unknown.

Description: Altcmd32.dll is not essential for Windows and will often cause problems. The altcmd32.dll file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 184,320 bytes (57% of all occurrences), 229,376 bytes and 4 more variants. 
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 32131238-5434-4234-4234-432432423432 or 32324134-3465-4325-6543-325435274523 or 12 more variants. It is a file with no information about its developer. The program is not visible. Altcmd32.dll is able to change the behavior of, or monitor Internet Explorer. There is no detailed description of this service. It is not a Windows system file. Therefore the technical security rating is 73% dangerous.

Uninstalling this variant: In case you experience problems using altcmd32.dll, you can uninstall altcompare from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify altcmd32.dll related errors

Important: Some malware also uses the file name altcmd32.dll, for example TROJ_CEFYNS.A or TROJ_FAKEAVAL.AC (detected by TrendMicro), and Trojan.Win32.BHO.ipl or Trojan.Win32.Dialer.bps (detected by Kaspersky). Therefore, you should check the altcmd32.dll process on your PC to see if it is a threat. If MsVCL1 Module 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 altcmd32 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active altcmd32 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the altcmd32.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

altcmd32.dll [all]