A family of Microsoft relational database management systems designed for ease of use.
I agree with Scott.
If you go to the point of reinstalling it, be sure to first uninstall it using Option 2 from https://support.office.com/en-us/article/uninstall-office-from-a-pc-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8 as other uninstalls can leave "crap" behind that can still cause issues when you reinstall the software. Options 2 clean ask that out so you new installation should be pristine.