Revit 2020
@Anonymous
Welcome to the Autodesk User's Community..
You need to provide more details and not just a generic response or question... Without your installation log file we can only speculate what the issue is at this point. So attach your installation file here so we can review it.
Posting info: Sometimes the installation log file contains the serial # that was assigned to you. Open your log file using Windows Notepad and perform a search on "/SN". Depending on the number of installation attempts, your serial # may be located throughout the log file. If present, remove or "X" out your serial # prior to posting.
For 2020 you also need to install the latest licensing mechanism https://synergiscadblog.com/2019/07/24/autodesk-licensing-mechanism/ before installing the 2020 product line.
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.