Office · PC · about 15 minutes · updated July 1, 2026
How to install and activate Office 2024 on a Windows PC
You have a 25-character key from ZED WEBTECH. Here is how to turn it into a working copy of Word, Excel and friends on a Windows 10 or 11 PC — about fifteen minutes, most of it download time.
Before you start
- Your product key (in the delivery e-mail)
- A free Microsoft account
- Windows 10 or 11 with 4 GB of free disk space
- An internet connection for the download and first activation
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01
Remove old trials first
If the PC came with a pre-installed Office or Microsoft 365 trial, uninstall it from Settings → Apps. Two editions on one machine confuse activation. Restart afterwards.
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02
Sign in at setup.office.com
Open setup.office.com in a browser and sign in with your Microsoft account (or create one — it takes a minute). This account becomes the permanent home of your licence, so pick one you will keep.
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03
Enter your product key
Type the 25 characters exactly as shown in your e-mail; dashes are added for you. Choose your country and language and click Next. The page confirms the edition it is about to attach to your account.
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04
Download the installer
Click Install. A small file named OfficeSetup.exe downloads. Run it and leave it alone — it streams the full suite in the background, typically five to ten minutes on a home connection.
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05
Open an app and sign in
Launch Word. When prompted, sign in with the same Microsoft account. Activation completes on its own — you will see Product Activated under File → Account.
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06
Keep the e-mail safe
Store your delivery e-mail. If you ever reinstall Windows you will not need the key again: sign in at office.com and click Install.
If something goes wrong
Common snags.
Word says "Unlicensed Product"
Sign out of any other Microsoft account inside Word (File → Account), then sign in with the one you redeemed the key on.
Setup says the key has already been used
Keys can only be redeemed once. If you redeemed it earlier, go to account.microsoft.com/services and install from there. If you never did, contact us with your order reference.
The installer stalls at a percentage
Pause your antivirus, check the connection and run OfficeSetup.exe again — it resumes where it stopped.
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