How Can You Tell if ntdll.dll Is Legit or a Virus?Īlthough ntdll.dll comes from the Windows operating system, it can be replaced without causing any damage to your computer. The truth is that ntdll.dll can be replaced with another version of the DLL without affecting your computer at all, and some security experts suggest that malware creators only use this name to fool users into thinking the file causes harm.
However, the sheer size of this file has led many security experts to question why such a large file is necessary on most computers. If you are using a 64-bit version of Windows the file size will be larger as it will be occupying both operating system directories, i.e., C:\Windows\System32 and C:\Windows\SysWOW64.Īs ntdll.dll is a Windows operating system file, it is unlikely to cause damage or other issues in your computer. The size of the ntdll.dll file varies depending on which version of Windows it is installed in, however the average size of the file is approximately 607KB. The ntdll.dll file is located in the C:\Windows\System32 directory of Windows operating systems and performs several important functions for these versions of Windows. What Are Dynamic Link Libraries Used For?Īs the name suggests, dynamic link libraries are part of a process that allows various programs to interact with each other.Īs a developer, you can use a dynamic link library to bring the features of another program onto your own, which means that you don’t have to duplicate these features in your own code. In order to create a program that remains present on your computer all the time, dynamic link library files are used. However, as soon as you close that program, it is removed from your computer and your computer returns to its default state. When you select the option to open a program in Windows, the program opens up and can be used by you in various ways. These files are used by several kinds of programs including Windows system processes. A dynamic link library, or DLL, is a type of executable file that contains code and resources.
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