Update defaults in documentation (#25483)

Following internal discussion

Relates: elastic/windows-installers#49
(cherry picked from commit 099ccd3)

Author: russcam

docs/reference/setup/install/windows.asciidoc

@@ -71,9 +71,6 @@ part of the installation:
 [[msi-installer-selected-plugins]]
 image::images/msi_installer/msi_installer_selected_plugins.png[]
 
-By default, the {xpack-ref}/index.html[X-Pack] plugin will be selected to be installed, and if 
-installing with the <<ingest, ingest>> node role, the {plugins}/ingest-attachment.html[Ingest Attachment Processor] and {plugins}/ingest-geoip.html[Ingest GeoIP Processor] plugins will also be selected for installation.
-
 NOTE: X-Pack includes a trial license for 30 days. After that, you can obtain one of the https://www.elastic.co/subscriptions[available subscriptions] or {ref}/security-settings.html[disable Security]. The Basic license is free and includes the https://www.elastic.co/products/x-pack/monitoring[Monitoring] extension.
 
 After clicking the install button, Elasticsearch will be installed: 
@@ -104,7 +101,7 @@ start /wait msiexec.exe /i elasticsearch-{version}.msi /qn
 
 As with any MSI installation package, a log file for the installation process can be found 
 within the `%TEMP%` directory, with a randomly generated name adhering to the format 
-`MSI*.LOG`. The path to a log file can be supplied using the `/l` command line argument
+`MSI<random>.LOG`. The path to a log file can be supplied using the `/l` command line argument
 
 ["source","sh",subs="attributes,callouts"]
 --------------------------------------------
@@ -129,7 +126,7 @@ as _properties_ within Windows Installer documentation) that can be passed to ms
 [horizontal]
 `INSTALLDIR`:: 
 
-  The installation directory. Defaults to `%PROGRAMFILES%\Elastic\Elasticsearch`
+  The installation directory. Defaults to `%ProgramW6432%\Elastic\Elasticsearch`
 
 `DATADIRECTORY`:: 
 
@@ -212,12 +209,13 @@ Defaults to `%ALLUSERSPROFILE%\Elastic\Elasticsearch\data`
 `SELECTEDMEMORY`:: 
 
   The amount of memory to allocate to the JVM heap for Elasticsearch. 
-  Defaults to half of the available memory on the target machine, up to a maximum of 30.5GB
+  Defaults to `2048`. If the target machine has less than 4GB in total, defaults
+  to 50% of total memory.
 
 `LOCKMEMORY`:: 
 
   Whether `bootstrap.memory_lock` should be used to try to lock the process
-  address space into RAM. Defaults to `true`
+  address space into RAM. Defaults to `false`
 
 `UNICASTNODES`:: 
 
@@ -245,8 +243,7 @@ Defaults to `%ALLUSERSPROFILE%\Elastic\Elasticsearch\data`
 
 `PLUGINS`:: 
 
-  A comma separated list of the plugins to download and install as part of the installation. Defaults to 
-  `x-pack, ingest-attachment, ingest-geoip`
+  A comma separated list of the plugins to download and install as part of the installation. Defaults `""`
 
 To pass a value, simply append the property name and value using the format `<PROPERTYNAME>="<VALUE>"` to
 the installation command. For example, to use a different installation directory to the default one: