Windows 7 is obsolete and no longer supported.
Audacity 3.0.4 “may” work on Windows 7, but there is no official testing on that platform, so no guarantees.
Similarly Windows XP is obsolete and not supported. As far as I’m aware, Audacity 3.x does not run on Windows XP.
First, uninstall all versions of Audacity from your computer.
Then download an old version from here: Old Audacity versions download (Audacity 2.4.2 may be a good one to try) and install it.