INSTALLATION You can install RenRot to your Windows platform, but you need to do several extra steps. STEP 1 First off, you must have a Perl 5.6.0 or later available on your system. If you need to install one, ActivePerl can be a good choice. You can get it here http://www.activestate.com/Products/ActivePerl/ Currently you don't have to provide any personal info for download, but if you are still in doubt, you can try to follow direct link http://www.activestate.com/Products/Download/Download.plex?id=ActivePerl and choose a build for Windows (as msi package - clickable option for novice, or zip file for more experienced users). Once you have Perl installed (it goes to C:\Perl by default), you can type perl --version to see installed version. STEP 2 Now you need make/nmake to continue. This article http://johnbokma.com/perl/make-for-windows.html explains what to do and what to make, but shortly go to Microsoft's Q132084 http://support.microsoft.com/default.aspx?scid=kb;en-us;Q132084 and download nmake http://download.microsoft.com/download/vc15/patch/1.52/w95/en-us/nmake15.exe Run the downloaded file to extract it and copy both the NMAKE.EXE and the NMAKE.ERR files to your Perl bin directory, normally C:\Perl\bin. STEP 3 Now download all dependencies (like ExifTool), unpack and install them, using nmake command instead of make. Use cpan for needed modules like running cpan Image::ExifTool or by cpan shell starting with perl -MCPAN -e shell STEP 4 Just like you installed dependencies, you can install renrot now: perl Makefile.PL nmake nmake install You are ready to go! NOTES: 1. To unpack tar.gz-files you can use WinZip (make sure that you extract files including full path, especially for ExifTool), or use free utility 7-zip http://www.7-zip.org/ 2. Be sure to call NMake.exe instead of make command. 3. One of the dependencies is jpegtran from libjpeg library and they do not provide binaries for Windows platform. To be able to rotate images, you must build it from source code yourself or download from this site http://sylvana.net/jpegcrop/jpegtran/