The DLL stands for DYNAMIC LINK LIBRARY, and it is actually a
necessary part of Window’s functioning. The usual path for these is
c:\windows\system32, although they may also show up under your username,
like in my example here.
The fact that they are ordinarily a normal part of Window’s
functionality doesn’t mean that they are not a threat. Sometimes
hackers can insert fake rundll files in your system to facilitate their
hack. One way to determine what the file is used for is to go to VIEW
in your toolbar, and then click SELECT COLUMNS.
On the next screen, click COMMAND LINES. This will show the full
path of the DLL file that you’re looking at. If you hover over this or
right-click and click PROPERTIES, it will show you exactly which program
is using the file. In this case, it is Nvidia, a driver for your video
card.
If you don’t recognize the program, you may want to communicate
with your friendly neighborhood computer geek to find out what the
program is and if it’s harmful.
For the most part, though, DLL files are nothing to worry about and allow your machine to function properly.
