Theory:

In the previous exercise, we discussed the procedure to download the main installer for LibreOffice. In this exercise, we will see the step-by-step to install the main program for LibreOffice.
 
Step-by-Step Procedure to install the LibreOffice main program:
 
Step 1: Install
 
Open the folder where the Main Installer has been downloaded and double-click on the Installer.
 
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Step 2: Welcome Screen
 
The Installation Wizard Welcome dialogue box opens, advising that the installation process is about to be started. Click “Next \(>\)”.
 
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Step 3: Setup Type
 
Another dialogue box opens, giving you a choice whether you want a default installation or whether you want to choose particular locations and components.
 
If you want a default installation just press “Next\(>\)”. If you want to make special choices, click on “Custom” and then press “Next\(>\)”.
 
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Step 4: Custom Setup
 
The Custom Setup enables changes to the features that will be installed.
 
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If you would like to install the spelling dictionaries, hyphenation rules, thesauruses, and grammar checkers:
  • Click Expand Optional Components
  • Click Expand Dictionaries
For instance, to install Tamil, ensure that Tamil is in list, If so, select the option "Tamil" and “This feature will be installed on the local hard drive.”
 
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Once all required changes to the features have been completed, click “Next\(>\)”
 
Step 5: File Type
 
Another dialog box opens, inviting you to choose whether to open Microsoft Office documents with LibreOffice. By default, this feature is not enabled. If you want LibreOffice to open Microsoft Office files (documents, spreadsheets, and presentations), put a checkmark in all four checkboxes.
 
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Click “Next \(>\)”
 
Step 6: Shortcut and Load during system start-up
 
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Another dialog box opens, asking you whether:
  • A shortcut to open LibreOffice should be placed on your desktop. The default option is to create a shortcut.
  • To load LibreOffice during system start-up.
After your selection, click “Install”.
 
Step 7: LibreOffice is Installing
 
If the User Account Control dialog shows, click “Yes” to continue the installation.
 
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Step 8: LibreOffice Installation Completed
 
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Click “Finish”.
Reference:
https://www.libreoffice.org/get-help/install-howto/windows/