What is profapi.dll?

The genuine profapi.dll file is a software component of Microsoft Windows Operating System by Microsoft.
Profapi.dll is a shared dynamic link library that stores program code, data and resources for prntvpt (prntvpt.dll) and d3dx9_38.dll in computers running Microsoft Windows XP, Windows Vista, Windows 7, or Windows 8, including 32 bit and 64 bit operating systems. DLL profapi.dll is associated with over 30,000 system files and is required for your computer to operate correctly. The Microsoft Windows operating system exhibits a graphical user interface which made its first appearance in 1985. It was developed as an easier way for users to operate their machines. All operating systems function as an interface between machine level language and user level software applications. Microsoft, founded by Bill Gates and Paul Allen in 1975, is the world's largest software maker with respect to revenue. Microsoft is best known for Windows. The company quickly rose to fame and fortune following the success of its 1986 public share offering turning three people into billionaires and an estimated 12,000 Microsoft employees into millionaires.

ProfAPI stands for User Profile Basic API

Profapi.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 profapi.dll is a Windows system file or if it belongs to an application that you can trust.

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Profapi.dll file information

The process known as User Profile Basic API belongs to software Microsoft Windows Operating System by Microsoft (

Description: Profapi.dll is not essential for the Windows OS and causes relatively few problems. Profapi.dll is located in the C:\Windows\System32 folder. The file size on Windows 10/8/7/XP is 31,744 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. It is a Microsoft signed file. It can change the behavior of other programs or manipulate other programs. The program is not visible. The service has no detailed description. The file is not a Windows system file. Therefore the technical security rating is 40% dangerous.

Recommended: Identify profapi.dll related errors

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


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Best practices for resolving profapi issues

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

profapi.dll [all]