can't save audacity project in Windows 10

I can’t save a new project in Audacity (am using windows 10).

I get a ‘file not found’ message, even though I am trying to save under a new file name.

I also get a message from Windows defender saying it has blocked unauthorised changes.

I have added Audacity as a trusted app in windows 10 but this hasn’t helped.

What’s the file name?

Don’t use punctuation marks in filenames except -dash- and underscore.

Stay away from regular dates like 5/19/19. Use ISO dates such as 20190519.

Some punctuation marks have special meaning to Windows. That help?

You should be using Audacity 2.3.2. Some earlier Audacity versions had “Save As” problems.

https://www.audacityteam.org/download/

Koz