If anyone has access to a Windows XP install, could you please try
running the builds from ticket
https://trac.torproject.org/projects/tor/ticket/10252?

Specifically:
https://people.torproject.org/~gk/testbuilds/torbrowser-install-3.5-alpha-1pre_en-US.exe
https://people.torproject.org/~gk/testbuilds/torbrowser-install-3.5-alpha-1pre_en-US.exe.asc


Any reports from other versions of Windows is also useful, of course.