Rundll32.exe: Everything You Need to Know
What is Rundll32.exe?
Rundll32.exe
is a legitimate executable file developed by Microsoft and is an
essential Windows file. This means that the file is essential to the running of
the operating system and should not be removed. The exception to this is if you
have a file under the same name which is actually a virus in disguise.
The file stands for Run Dynamic Link Library32-bit and is used to run programs held in Dynamic Link Library files (DLL).
DLL is a common set of instructions that is used by many Windows programs, therefore,
the file is used to run these programs when called upon. This is why you may
spot a number of rundll32.exe processes running in Task Manager at the same
time.
Is rundll32.exe Safe?
The legitimate rundll32.exe file is safe and
should not be removed because it can cause errors for any programs that require
the file to run. The legitimate file
will be located in C:\Windows\System32 folder. You can find where the file is
located by right-clicking on rundll32.exe in the Processes pane in Task Manager and selecting Properties. If the file is located
anywhere other than C:\Windows\System32
folder, then it is most likely a virus in disguise.
If you have a Rundll32.exe file is that
located in the right place but is causing problems then the file may be corrupted
or damaged. These problems can be error messages or abnormal computer
performance which ceases if you end the Rundll32.exe process in Task Manager.
If you fall into this category you should run
the System File Checker tool to scan
your computer for missing or damaged files. This tool is built into all modern
Windows systems and can be run by using the following method (Windows 8/10):
●
Press Win+X and select Command
Prompt (Admin)
●
Select Yes on the User Account Control (UAC) prompt
●
Type SPC/scannow and press Enter
on your keyboard.
You can also manually update your file to the
latest patched version by downloading it from Microsoft Update Catalog.
The rundll32.exe file is needed for Internet
Explorer to function properly so if you are receiving error messages when using
Explorer, this could be a sign you have an infected file. Infected versions of
the file can also block important programs like Task manager and some settings
in Control Panel. A known error message associated with the file is:
Runtime
Error!
Program
C:\Windows\System32\rundll32.exe
How to Remove a rundll32.exe Virus
If you suspect you have a virus disguised as
rundll.exe then it needs to be removed. The best way to do this is to use an
anti-virus program that can properly identify the virus and remove all versions
of it from your computer. This is the fastest and most efficient way to remove
the virus since the software will already have a catalog of known viruses to
match it with and will automate the removal process. Often removing viruses can
be difficult, especially when they hijack important system processes and
restrict your access to essential security programs.
