http://bugs.winehq.org/show_bug.cgi?id=28486
--- Comment #25 from Hans Leidekker hans@meelstraat.net 2012-05-01 12:12:10 CDT --- (In reply to comment #24)
WINEDEBUG=+msi wine setup.exe > ms_office2010_msi_log 2>&1 gzip ms_office2010_msi_log
the gzipped log file of the MS Office 2010 installation for download is here: https://docs.google.com/open?id=0B8qBHKNhZAipY1FvTFZUV1d2YUk
Looks like you're using a 64-bit prefix. Does it also fail on a 32-bit prefix?