Can't run Libre Office on new SSD (Windows 8.1)

I upgraded my laptop (Windows 8.1) by installing a new SSD to replace the HDD. I then installed LibreOffice_6.0.4_Win_x64.msi. It completed the installation successfully. But when I try to run Office, it loads for a few seconds then gets into a ‘Not Responding’ loop which continues indefinitely. So it doesn’t open at all. I thought it might be the 6.0.4. version so I uninstalled, and chose an earlier Office (5.4.7). Same result, and same again even with 5.1.6.2 (which ran perfectly on the HDD before I swapped it for the SSD). What has gone wrong? Why won’t Office open at all? I installed other software (Scribus, Gimp) on the new SSD and they run perfectly. Any suggestions why Office won’t run?

Laptop: Win 8.1 64-bit

What OS (Win- 32-Bit or 64-Bit) is running on your system?

Laptop: Windows 8.1 64-bit

I bought a new notebook with SSD.
Windows 10 64 bit.
LibreOffice is not working any more.

It looks like this:

Seems this is a bug, post a bug, and who would want to know most is L. O. at,
https://www.libreoffice.org/get-help/feedback/?LOversion=6.0.1.1&LOlocale=en-US&LOmodule=SpreadsheetDocument