How to Install Microsoft Office Pro Plus LTSC 2019

Microsoft Office Pro Plus LTSC 2019 is a Windows-based productivity suite for users who need classic Office desktop applications such as Word, Excel, PowerPoint, Outlook, Access, Publisher, and other Office tools for daily work, study, business documents, spreadsheets, presentations, email, and office productivity tasks.

This guide explains how to install Office Pro Plus LTSC 2019 on a Windows PC using the direct installer file, then activate it with a product key using the telephone activation method.

Before starting the installation, make sure you already have a valid Office Pro Plus LTSC 2019 activation key from Digital Keys Depot. The key will be required after installation when you activate the Office applications.

If you have not purchased a product key yet, please purchase the correct Office product key first before continuing with this installation guide.

Before You Start

Before installing Office Pro Plus LTSC 2019, prepare the following:

A Windows PC or laptop
A stable internet connection
Your Office Pro Plus LTSC 2019 product key
Administrator access on your Windows device
The correct Office installer file, either 32-bit or 64-bit
A valid email address for Confirmation ID support
Enough time to complete installation and activation

This guide is for Windows PC only. It is not intended for Mac, Chromebook, Android, iPhone, iPad, or web-only Office apps.

Important: Remove Old Office Versions First

Before installing Office Pro Plus LTSC 2019, it is strongly recommended to uninstall all older Microsoft Office versions from your computer.

Keeping old Office versions installed may cause problems such as:

Installation errors
Activation conflicts
Office apps opening with the wrong version
Product key errors
Mixed Office components
Failed telephone activation
Confusing license status inside Word, Excel, or PowerPoint

To uninstall old Office versions:

Click the Windows Start button.
Open Settings.
Go to Apps.
Search for Microsoft Office.
Select the old Office version installed on your PC.
Click Uninstall.
Follow the instructions until the uninstall process is complete.
Restart your PC if Windows asks you to do so.

If you see more than one Office version installed, remove all old Office versions before installing Office Pro Plus LTSC 2019.

Step 1: Check Whether Your Windows Is 32-bit or 64-bit

Before downloading the Office installer, you need to check whether your Windows system is 32-bit or 64-bit.

This is important because you should download the installer that matches your Windows system type.

Follow these steps:

Click the Windows Start button.
Open Settings.
Click System.
Scroll down and choose About.
Look for Device specifications.
Find System type.

If it says 64-bit operating system, download the 64-bit Office installer.

If it says 32-bit operating system, download the 32-bit Office installer.

Choosing the correct installer helps avoid installation errors and compatibility issues.

Step 2: Download the Correct Office Installer

After checking your Windows system type, download the Office Pro Plus LTSC 2019 installer that matches your device.

32-bit installer:
https://digitalkeysdepot.com/downloads/Office_2019_EN_32Bits.exe

64-bit installer:
https://digitalkeysdepot.com/downloads/Office_2019_EN_64Bits.exe

Only download one installer based on your Windows system type.

If your Windows is 64-bit, use the 64-bit installer.

If your Windows is 32-bit, use the 32-bit installer.

If you are not sure which one to use, check your Windows system type again before downloading.

Step 3: Run the Installer as Administrator

After the download is complete, open the folder where the installer file is saved.

Then follow these steps:

Right-click the Office installer file.
Choose Run as administrator.
If Windows asks for permission, click Yes.
Wait for the installer window to open.
Click Install.
The installer will extract the required files.
After extraction, the Office installation process will begin.
Wait until the installation is complete.

Do not close the installer while the process is running.

Do not restart or shut down your PC during installation.

Depending on your computer performance, the installation process may take several minutes.

Step 4: Wait Until Installation Is Complete

During installation, Office will prepare and install the required applications on your Windows PC.

Please wait patiently until the process is fully complete.

Once the installation has finished, you can open one of the Office applications to begin activation.

You can open:

Microsoft Word
Microsoft Excel
Microsoft PowerPoint
Microsoft Outlook

To find the apps, click the Windows Start button and type the app name, such as Word or Excel.

Step 5: Activate Office Pro Plus LTSC 2019

The final step is activation.

Before starting, ensure you have a valid Office Pro Plus LTSC 2019 activation key.
👉 Available for purchase here.

Follow this guide to activate Office Pro Plus LTSC 2019.

Step 6: Check Office Activation Status

After activation, you can check whether Office is activated.

Follow these steps:

Open Microsoft Word or Excel.
Click File.
Click Account.
Look at the Product Information section.

If activation is successful, Office should show an activated product status.

If Office still asks for activation, check your product key, Installation ID, and Confirmation ID again.

What Applications Are Included?

Depending on the installer and product configuration, Office Pro Plus 2019 may include classic desktop Office applications such as:

Word
Excel
PowerPoint
Outlook
Access
Publisher
OneNote or related Office components

This product does not include Windows, Microsoft 365 subscription benefits, Project, Visio, or other Microsoft products unless purchased separately.

Why Telephone Activation Is Used

Telephone activation is useful when Office needs manual confirmation after the product key is entered.

The process uses two important codes:

Installation ID:
Generated by the Office activation wizard on your PC.

Confirmation ID:
Used to complete activation after the Installation ID is processed.

The Confirmation ID must match the Installation ID shown on the same activation screen. If you close the activation window or restart the process, the Installation ID may change and you may need a new Confirmation ID.

Important Notes Before Activation

Before starting telephone activation, please make sure:

Office Pro Plus LTSC 2019 is already installed.
You are using the correct Office product key.
The product key is entered correctly.
You selected Activate by Telephone.
You copied the Installation ID from the correct activation window.
Your email address is valid.
You enter the Installation ID without spaces or extra symbols.
You do not close the activation window before entering the Confirmation ID.

Following these steps carefully can help avoid activation errors.

Troubleshooting: Installer Does Not Open

If the Office installer does not open, try the following:

Make sure the download is complete.
Right-click the installer and select Run as administrator.
Restart your computer and try again.
Check whether antivirus or Windows security is blocking the file.
Download the installer again if the file is damaged.
Make sure you downloaded the correct 32-bit or 64-bit version.

Troubleshooting: Installation Fails

If installation fails, check these possible causes:

Old Office versions are still installed.
You downloaded the wrong installer for your Windows system.
You do not have administrator permission.
The installer file is incomplete or damaged.
Your Windows system needs to be restarted.
There is not enough free storage space.
Security software is blocking the setup process.

To fix it, uninstall old Office versions, restart your PC, download the correct installer again, and run the file as administrator.

Troubleshooting: Product Key Is Not Accepted

If your product key is not accepted, check the following:

Make sure the product key is typed correctly.
Make sure there are no extra spaces.
Make sure the key matches Office Pro Plus 2019.
Make sure you are not using a key for a different Office version.
Make sure you are not using a Project or Visio key.
Make sure the installed Office edition matches your product key.

If the issue continues, contact support and provide the error message shown on your screen.

Troubleshooting: Activate by Telephone Option Does Not Appear

If the Activate by Telephone option does not appear, try these steps:

Make sure you have entered the product key first.
Restart the Office application.
Open another Office app, such as Word or Excel.
Go to File > Account.
Check the activation options again.
Restart your computer if needed.

If the option still does not appear, contact support for further help.

Troubleshooting: Installation ID Is Not Working

If your Installation ID is not accepted on the GetCID page, check the following:

Make sure you entered the full Installation ID.
Do not include spaces.
Do not include unnecessary symbols.
Make sure the Installation ID has the correct number of digits.
Make sure you did not miss or repeat any number.
Use the screenshot upload option if available.
Make sure the Installation ID is from the current activation window.

If you close and reopen the activation wizard, the Installation ID may change. In that case, use the new Installation ID.

Troubleshooting: Confirmation ID Does Not Work

If the Confirmation ID does not activate Office, check the following:

Make sure the Confirmation ID was entered correctly.
Make sure each group of numbers is placed in the correct box.
Make sure the Installation ID used to generate the Confirmation ID is still the same.
Do not restart the activation process before entering the Confirmation ID.
Do not close the activation wizard before completing activation.

If the activation screen changes and shows a new Installation ID, request a new Confirmation ID using the new Installation ID.

Common Mistakes to Avoid

Avoid these common mistakes during installation and activation:

Installing Office without uninstalling old Office versions
Downloading the wrong 32-bit or 64-bit installer
Running the installer without administrator permission
Entering the wrong product key
Using a key for a different Microsoft product
Closing the activation window before entering Confirmation ID
Typing Installation ID with missing digits
Adding spaces or symbols to the Installation ID
Entering Confirmation ID in the wrong order
Trying to activate Office on unsupported devices

After Office Is Activated

After Office is activated, you can start using Office applications for your daily tasks.

You can use Office Pro Plus 2019 for:

Writing documents in Word
Creating spreadsheets in Excel
Preparing presentations in PowerPoint
Managing emails in Outlook
Creating databases in Access
Designing publications in Publisher
Working with office files offline on your Windows PC

Keep your product key and order information in a safe place for future reference.

Frequently Asked Questions

Is this guide for Windows?

Yes. This guide is for Windows PC and laptop users.

Can I use this guide for Mac?

No. This guide is not for Mac.

Do I need to uninstall old Office versions first?

Yes. It is strongly recommended to uninstall all old Office versions before installing Office Pro Plus LTSC 2019.

How do I know whether to download 32-bit or 64-bit?

Go to Settings > System > About and check the System Type section. Download the installer that matches your Windows system type.

Do I need a product key?

Yes. You need an Office Pro Plus LTSC 2019 product key to activate Office after installation.

What is Installation ID?

Installation ID is a long number generated by the Office activation wizard when you choose telephone activation.

What is Confirmation ID?

Confirmation ID is the code used to complete telephone activation. It is generated based on your Installation ID.

Where can I get the Confirmation ID?

You can get it from:

https://digitalkeysdepot.com/getcid/

Enter your product key, email address, and Installation ID to request the Confirmation ID.

Can I close the activation window while waiting for Confirmation ID?

It is better not to close the activation window. If you close it and start again, the Installation ID may change.

What should I do if the Confirmation ID does not work?

Check whether the Installation ID and Confirmation ID match the same activation session. If the Installation ID changed, request a new Confirmation ID.

Does this guide install Project or Visio?

No. This guide is for Office Pro Plus LTSC 2019. It does not install Project or Visio.

For the Project or Visio LTSC Installation Guide:
👉 Project Professional 2024 LTSC Installation Guide
👉 Visio Professional 2024 LTSC Installation Guide

Is this a Microsoft 365 subscription?

No. This guide is for the desktop Office Pro Plus 2019 installation, not a Microsoft 365 subscription.

Conclusion

Installing Office Pro Plus LTSC 2019 is simple when you follow the correct steps.

First, uninstall any old Office version from your computer. Then check whether your Windows system is 32-bit or 64-bit and download the matching installer. After the download is complete, run the installer as administrator and wait until Office is fully installed.

After installation, open Word, Excel, or another Office app, enter your product key, choose Activate by Telephone, copy the Installation ID, and use the GetCID page to receive your Confirmation ID.

Once the Confirmation ID is entered correctly, Office Pro Plus LTSC 2019 will be activated and ready to use on your Windows PC.

If you do not have a product key yet, purchase the correct Office product key first and make sure it matches the version, edition, activation method, and device count you need.