How to install & activate MS Office 2019
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I will explain how to install MS Office 2019
1. Uninstall Existing Office
First, you must remove all previously installed MS Office programs.
https://aka.ms/SaRA-officeUninstallFromPC
Click the link above, and you will see a window like the one below.

After clicking 'Open', please wait a moment, and the following menu will appear automatically.

Click 'Yes' to proceed with the removal of the existing Office, and a PowerShell window will appear as shown below.

Wait until all tasks are complete, then press any key to close the window.
In some cases, it may not be possible to remove MS Office using PowerShell, so please proceed with the following steps after completing the above.

First, type 'Add or remove programs' in the Start menu search bar.

Delete all programs related to 'Microsoft 365 (Office)' and 'Microsoft Office' from the list of installed apps.
2. Installing Office
Go to the link above.

Click 'Get started' to proceed to the login screen.

Even if you already have a Microsoft account, if multiple Office keys are registered, it may cause errors or invalidate existing keys. Therefore, please be sure to create a new account and log in.

Enter the product key you received from Winstall by email in the product key input field, then click Next.

Your preferred language is selected as default. If you want another language, select another language and then click Redeem.
Consent to receive marketing information and the use of personal information for marketing purposes is not required. It is recommended that you do not select this option.

Choose between 64-bit and 32-bit versions and download the one you prefer.
64-bit: No memory usage limit, better for processing large data, may have compatibility issues with some 32-bit add-ons and code, only works on 64-bit Windows.
32-bit: Maximum 2GB memory usage, higher compatibility with existing 32-bit add-ons and code, works on both 32-bit and 64-bit Windows.

Run "OfficeSetup" from your Downloads folder.

Make sure your computer stays online during installation and wait for it to complete.

Once installation is complete, click "Close".

Type "Excel" or "Word" in the Start menu search bar and run the program. The license agreement window will appear.
Click "Accept" to agree to the license agreement.

Go to the Account tab to check your login and activation status.

If you see a window like the one above after accepting the Excel or Word license, please refer to the link below.