Hi.
I’m on Windows 10 latest version up to date.
I upgraded 15 days ago to the new Libreofffice 7. I deinstall version 6, rebooted, then installed v7.
I noticed quite soon that when I open an odt file, I write some things or EVEN if I don’t type anything, I just read the file, when I leave to another program, the odt document is still opened but I go surfing on google chrome or firefox, I use my files program, I watch a video, well I come back say less than 5 minutes later, the document is frozen. I can’t select anything, I click to select words, the cursor does nothing, impossible to add text, the cursor flies above the document.
I can select the menu, but if for example I go to “edit” and choose “Selec All” (Control + A), nothing happens.
The document also can’t be moved inside with selectors on the right of screen or I can’t with my mouse roll button to navigate the pages. So if my document has 2 pages, if I’m on page 1, I can’t go to page 2. The document is frozen !! Nothing inside is selectable.
I waited for the next iteration of LO and today I just installed the latest 7.0.1.
Deinstall 7.0, I reboot. I install 7.0.1. Same !!! Frozen !!! 
I deinstalled 7.0.1, rebooted and installed 6.4.6, cross fingers and… it works again as usual !!! Everything is fine and back to normal behaviour.
But one thing:
After installing 6.4.6, when I wanted to open an odt document, an error message pop up and told me that file vcruntime140_1.dll was missing. I clicked again on 6.4.6 exe file and it proposed me to remove, reinstall or repair. I choosed repair and went through all the installation again, clicked on an ODT document, same error.
So I downloaded a vcruntime140_1.dll here:
https://www.dll-files.com/vcruntime140_1.dll.html
put it inside C:\Windows\System32
And it worked!! I don’t know what happened between desinstalling version 6, then installing v7, then v7.0.1, then v6 again, something wrong must have happen but it seems back to normal now.
Version 7 or 7.0.1 is freezing for me and totally useless. I can’t do anything with it. The first time in my life I experience this with LO and I use LO since version 3 when this fork started from OpenOffice.
I’m ready to make some tests if needed to help the community.
But am I the only one to experience that?
I’m under windows 10 - 64bits and I downloaded and installed LO 64bits of course. No error on that. My Windows is up-to-date to the latest version. I really don’t understand what is going on here.
Thank you very much.