Libreoffice version 6.1 would not install on 64 bit W7 Home Premium until I removed version 5.4 and rebooted. Then it went up in less than 15 minutes.
On 64 bit W7 Is it necessary to remove ver 5 before installing ver 6? If so, the installation notes should say this. I didn’t see it there.
Further required fields (below) should be marked as such and and required entries listed.