Hi Fleetfoot,

re:
> The moi.css file keeps saying I need permission from S-1-5-21-3930758702359839782-1092893196
> to make changes to this file.

That's pretty mysterious.. Maybe something about the ownership of the file is messed up, I guess you might try taking ownership of it something like described here:
https://support.microsoft.com/en-us/kb/308421

Anyway something involving permissions and file ownership is probably messed up on your file system there.


re:
> Also, why the blank white screen when trying to run Moi3D from the USB stick? It works
> fine on a Windows7 machine, but not 8.1.

You mean the very same USB stick runs ok from Windows 7 but not from 8.1 ?

My best guess is that you've got some kind of different anti-virus running on the 8.1 machine which is blocking various files from being accessed. Probably some kind of interfering process like that is likely.

- Michael