You wrote:  " I have windows 10 with administrator privileges and keep getting an error message when i download turbotax deluxe 2018. any idea what might be going wrong?"

No.  You didn't provide the error message so it would be unlikely that anyone would know what you are experiencing without details. 

Did you recently purchase the 2018 Deluxe software as a program download at the TurboTax website?  Please describe what all you are doing and any roadblock, messages, etc.  and, hopefully, someone may be able to comment further.  Or if it can't be solved here, we can tell you how to phone TurboTax Support.

i purchased and downloaded the wrong deluxe program to file 2018 taxes and i need to know how to get the windows version?

A representative on our phone support team can assist you.  The following Help Article will assist you in connecting with the right person to get the help you need:  What is the TurboTax phone number?