What is mscand20.dll?

Mscand20.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if mscand20.dll is a Windows system file or if it belongs to an application that you can trust.

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Mscand20.dll file information

The process known as Microsoft Candidate (version UI 9.0) belongs to software Microsoft Candidate UI or Microsoft Office Professional by Microsoft (

Description: Mscand20.dll is not essential for the Windows OS and causes relatively few problems. The mscand20.dll file is located in a subfolder of "C:\Program Files\Common Files". Known file sizes on Windows 10/8/7/XP are 385,888 bytes (62% of all occurrences) or 379,456 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program has no visible window. The mscand20.dll file is digitally signed. There is no detailed description of this service. The file is able to record keyboard inputs. Mscand20.dll is not a Windows system file. Mscand20.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 80% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you want to remove the program completely, go to Control Panel ⇒ Software ⇒ Microsoft Office Professional.

Recommended: Identify mscand20.dll related errors

Important: Some malware camouflages itself as mscand20.dll. Therefore, you should check the mscand20.dll 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

This is Microsoft Candidate UI by Microsoft

Summary: Average user rating of mscand20.dll: based on 1 vote with 1 user comment. One user thinks mscand20.dll is essential for Windows or an installed application.

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Best practices for resolving mscand20 issues

A clean and tidy computer is the key requirement for avoiding problems with mscand20. 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 mscand20.dll 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

mscand20.dll [all]