What is Rundll32.dll?
Rundll32.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 Rundll32.dll belonging to the Windows system or an application you can trust.
Rundll32.dll file information
Description: Rundll32.dll is not essential for Windows and will often cause problems. Rundll32.dll is located in the folder C:\Windows\System32.
The file size on Windows 7/XP is 81,920 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. There is no file information. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The file is not a Windows core file. Therefore the technical security rating is 82% dangerous, however also read the users reviews.
Recommended: Identify Rundll32.dll related errors
If Rundll32.dll is located in a subfolder of C:\, the security rating is 74% dangerous. The file size is 41,984 bytes. There is no information about the author of the file. The program is not visible. The file is not a Windows system file. The process listens for or sends data on open ports to a LAN or the Internet.
If Rundll32.dll is located in a subfolder of "C:\Program Files", the security rating is 66% dangerous. The file size is 23,552 bytes. The program is not visible. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The file is not a Windows core file.
If Rundll32.dll is located in a subfolder of "C:\Documents and Settings", the security rating is 36% dangerous. The file size is 14,848 bytes.
Important: Some malware also uses the file name Rundll32.dll, for example Hacktool or Trojan Horse (detected by Symantec), and Tool:Win32/SqlCrack or Trojan:Win32/Opachki.A (detected by Microsoft). Therefore, you should check the Rundll32.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.
Ann (further information)
Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.
Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.
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