Update install manager docs (python/pymanager#227)

Author: zooba

Doc/using/windows.rst

@@ -126,9 +126,8 @@ is also an unambiguous ``pymanager`` command. Scripted installs that are
 intending to use Python install manager should consider using ``pymanager``, due
 to the lower chance of encountering a conflict with existing installs. The only
 difference between the two commands is when running without any arguments:
-``py`` will install and launch your default interpreter, while ``pymanager``
-will display help (``pymanager exec ...`` provides equivalent behaviour to
-``py ...``).
+``py`` will launch your default interpreter, while ``pymanager`` will display
+help (``pymanager exec ...`` provides equivalent behaviour to ``py ...``).
 
 Each of these commands also has a windowed version that avoids creating a
 console window. These are ``pyw``, ``pythonw`` and ``pymanagerw``. A ``python3``
@@ -187,12 +186,11 @@ that virtual environment. In this scenario, the ``python`` command was likely
 already overridden and none of these checks occurred. However, this behaviour
 ensures that the ``py`` command can be used interchangeably.
 
-When you launch either ``python`` or ``py`` but do not have any runtimes
-installed, and the requested version is the default, it will be installed
-automatically and then launched. Otherwise, the requested version will be
-installed if automatic installation is configured (most likely by setting
-``PYTHON_MANAGER_AUTOMATIC_INSTALL`` to ``true``), or if the ``py exec`` or
-``pymanager exec`` forms of the command were used.
+When no runtimes are installed, any launch command will try to install the
+requested version and launch it. However, after any version is installed, only
+the ``py exec ...`` and ``pymanager exec ...`` commands will install if the
+requested version is absent. Other forms of commands will display an error and
+direct you to use ``py install`` first.
 
 
 Command help
@@ -777,7 +775,7 @@ Troubleshooting
 
 If your Python install manager does not seem to be working correctly, please
 work through these tests and fixes to see if it helps. If not, please report an
-issue at `our bug tracker <https://github.com/python/cpython/issues>`_,
+issue at `our bug tracker <https://github.com/python/pymanager/issues>`_,
 including any relevant log files (written to your :file:`%TEMP%` directory by
 default).