If you're reading this, you might have been told by SumatraPDF
that you have a corrupted installation.
How can that happen?
SumatraPDF comes in two flavors: a portable version and an installer.
A portable version is a self-contained executable and cannot be
An installer needs to be run to be properly installed. Part of it is
libmupdf.dll library needed by installable
You cannot just rename the installer and run it.
There are 2 possible problem:
libmupdf.dll is missing
libmupdf.dll is there but its version doesn't match
the version of
How to solve the problem?
If you want to place SumatraPDF in any location, under any name, use
the self-contained portable flavor.
If you insist on using the installable version, just install it. The
installer will run if it has
in the name of the
.exe (which it will if you download
If you rename the
.exe, you can force running the
Alternatively, you can extract
libmupdf.dll and all other