What is ucrtbase.dll?
The genuine ucrtbase.dll file is a software component of Microsoft Visual C++ by Microsoft.
Microsoft Visual C++ is an IDE developed by Microsoft. Ucrtbase.dll is a dynamic link library file that is associated with Microsoft Visual C++, and is a legitimate Windows file that does not cause any threat to your PC.
Microsoft Visual C++ is an integrated development environment by Microsoft that is designed for the C, C++, and C++/CLI programming languages. Once a standalone product, this proprietary software is now part of Visual Studio and is available in both freeware and trialware forms. It features tools for developing and debugging C++ code, and its packages are needed by several applications to function properly. This software comes with several C runtime libraries to allow users to create their code with any of them.
Established in 1975, the Microsoft Corporation is a leading American technology company that has a global footprint. The company offers an expansive portfolio of products including the Windows range of operating systems, Microsoft surface tablets and Xbox video game console. Microsoft was regarded as the world's largest software maker in terms of revenue and most valuable companies in 2016 and acquired LinkedIn and Skype Technologies in 2016 and 2011 respectively.
UCRtBase stands for Universal C Runtime Base
Ucrtbase.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 ucrtbase.dll is a Windows system file or if it belongs to an application that you can trust.
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Ucrtbase.dll file information
The process known as Microsoft C Runtime Library belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: The original ucrtbase.dll is an important part of Windows and rarely causes problems. Ucrtbase.dll is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/11/7 are 1,181,208 bytes (38% of all occurrences), 914,584 bytes and 10 more variants. 
It is digitally signed. The program is not visible. It is a Microsoft signed file.
Therefore the technical security rating is 2% dangerous, however you should also read the user reviews.
Recommended: Identify ucrtbase.dll related errors
- If ucrtbase.dll is located in a subfolder of "C:\Program Files", the security rating is 40% dangerous. The file size is 917,184 bytes (52% of all occurrences) or 883,712 bytes.
The ucrtbase.dll file is not a Windows system file. It can change the behavior of other programs or manipulate other programs. The service has no detailed description. The program is not visible. The ucrtbase.dll file is certified by a trustworthy company.
Uninstalling this variant:
In case of any problems with ucrtbase.dll, you can do the following:
- If ucrtbase.dll is located in a subfolder of C:\Windows, the security rating is 27% dangerous. The file size is 921,280 bytes (93% of all occurrences) or 1,142,072 bytes.
The program is not visible. The file is not a Windows system file. It is digitally signed. It can change the behavior of other programs or manipulate other programs. The service has no detailed description.
- If ucrtbase.dll is located in the C:\Windows folder, the security rating is 10% dangerous. The file size is 921,280 bytes (33% of all occurrences), 1,142,072 bytes or 1,023,128 bytes.
Important: Some malware disguises itself as ucrtbase.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the ucrtbase.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.
Best practices for resolving ucrtbase issues
A clean and tidy computer is the key requirement for avoiding problems with ucrtbase. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the ucrtbase.dll process on your computer, the following programs have proven to be helpful: ASecurity 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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
launchap.exe kss.exe stk02nm.exe ucrtbase.dll mainservice.exe pwmdbsvc.exe helperservice.exe cpu.exe printfilterpipelinesvc.exe aetcrss1.exe nginx.exe [all]
Score
User Comments
Seppo Yli-Olli
Thijs
Summary: Average user rating of ucrtbase.dll: based on 3 votes with 2 user comments. 3 users think ucrtbase.dll is essential for Windows or an installed application.