Hi Christian,
I have not seen that error before. Is that happening during installation, after installing, and when trying to run one of the programs? It looks like it is *after* installation.
I don't think I've seen the installer put programs in C:\programdata, but maybe there's some Windows environment variable that sets that. Do you know if that is the case? Like, was Larch installed from an Administrator account?
It looks like the problem is that you do not have permission to write to a Temp folder "C:\Users\Asus\AppData\Local\Temp". Can you verify if you have permission for that? Could it be that some other user account was used to install or is running the application?