Cannot install after a failed install

I was installing LibreOffice (Windows 10) on my Acer Notebook when it shut off because the battery was too low. Now when I try to do the install again, it says there is an install in progress that I need to finish before doing the current install. How do I reset the “Install in Progress” flag? Thanks.

See this FAQ.

DOH! Answer: Reboot then reinstall. Sorry.