Are you using an old version of Audacity? The current version is 2.3.2, and it is available via the Audacity website: https://www.audacityteam.org/download/windows/
The current version will probably not solve the problem, but it should give a better error message to help us identify the problem.
I don’t understand what you are asking. If you want to download the current version of Audacity for Windows, visit this page (in your web browser) and follow the links to the file download: https://www.audacityteam.org/download/windows/