How to remove the mstask64 virus

Most antivirus programs identify mstask64.dll as malware.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the mstask64.dll malware

Mstask64.dll file information

The mstask64.dll process does not contain any data about its author.

Description: Mstask64.dll is not essential for Windows and will often cause problems. Mstask64.dll is located in a not identifiable folder. The file size on Windows 10/8/7/XP is 0 bytes. 
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 81A35F39-4850-474E-92C9-B4CF283207E0. There is no information about the author of the file. Note: File does not exist any longer. The program is not visible. Mstask64.dll is able to monitor web browsers. The service has no detailed description. It is not a Windows system file. Mstask64.dll is an unknown file in the Windows folder. Therefore the technical security rating is 74% dangerous.

Recommended: Identify mstask64.dll related errors

External information from Tony Klein:

Important: You should check the mstask64.dll process on your PC to see if it is a threat. If mstask64.dll 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 mstask64 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active mstask64 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the mstask64.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

mstask64.dll [all]