When installing Splunk (any recent version) it gets about 80% through the file transfer then begins to roll back the install and restores it to the original state.
is this on windows? try to install as admin in command prompt.
This could be interesting as well
It is a windows 10 machine
windows 10 as well , try admin rights with comand prompt
Did you tried it?
if it helped please accept the question 🙂