BitDefender detects Kazy.7720 in soffice.exe, also in .msi during an extra check. LibO will not work after that. I will contact BitDefender and also do an additional test in a VirtualBox. Pretty sure that it's a false alert, but you never know. So it would be NOTORUBUG, but annoying for lots of users "Bug 36679 - Virus detected on installation" was similar?
AVAST Antiviurs did not detect any problem when I did an installation under WIN XP in VirtualBox, what's underpinning my suspect concerning false alarm (And, of course, it's an INSTALLATION problem, there seems to be a Bug on <http://wiki.documentfoundation.org/BugReport_Details>, I will check that).
After several tests with other Antivirus Programs: NOTOURBUG
My mistake, in soffice.bin, notin soffice.exe! Same observation has been reported in German mailing list with Avira Anrivirus and GData.
Avira detects TR/Kazy.7720 in soffice.bin. During installation and each soffice run. Is it a false alert? LibO_3.5.0rc2_Win_x86_install_multi
I read on libreoffice-qa@lists.freedesktop.org that the problem is solved by Avira
An own test with "LibO_3.5.0rc2_Win_x86_install_multi.msi" and current Bit Defender Virus definitions (I contacted support) did no longer complain) "soffice.bin".
Solved by new virus definitions of Avira today.