can't download libre office

says missing Libreoffice_4.3.4_Win_x86.msi - won’t go any further.

did you mean 4.4.3 instead ?
the current download are either 4.3.7 or 4.4.3

http://download.documentfoundation.org/libreoffice/stable/4.3.7/win/x86/LibreOffice_4.3.7_Win_x86_sdk.msi
or
http://download.documentfoundation.org/libreoffice/stable/4.4.3/win/x86/LibreOffice_4.4.3_Win_x86.msi

if for some reason you really, really want to use the older 4.3.4 then
https://downloadarchive.documentfoundation.org/libreoffice/old/4.3.4.1/win/x86/LibreOffice_4.3.4.1_Win_x86.msi