Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

SumatraPDF compatible with Windows XP

What is the latest version of Sumatra compatible with Windows XP?

The Last version that was successfully known to have compiled and tested as working was version 3.1.2 see Previous versions of Sumatra PDF (sumatrapdfreader.org)

There have been suggestions that with the right adjustments and extensive debugging it might be possible to compile a more recent version. However the code was not frozen just for legacy XP support.see Hacking Sumatra PDF 3.2 to work on WinXP & Server 2003 (x86/x64)