Is LO compatible with windows RT8.1. I have tried this unsuccessfully

LO and Windows RT8.1

Yes, of course. Just make sure you download the Windows version.

Completely wrong.

Sorry for that. I never will answer again a question early morning. I simply didn’t see the RT.

No, absolutely not. Window$ RT is completely incompatible with regular Window$, therefore you can’t run anything on RT that ain’t made specifically for RT 8.x or for Window$-on-ARM.