Microsoft.Jet.OLEDB.4.0 provider is not registered on the local machine

Question

Hello,

I am working on converting an xlsx file to csv.  I cut and pasted some code from Yuan Wang from the following URL

http://www.c-sharpcorner.com/UploadFile/yuanwang200409/102242008174401PM/1.aspx

When the code gets to the statement
conn.Open(); I get the error message "Microsoft.Jet.OLEDB.4.0 provider is not registered on the local machine"

I do not know what Jet.OLEDB.4.0 is.  Is this something I need to download and install and if so, do I need to be careful about the 32bit vs 64 bit OS; I have 64.