Solved: Microsoft Office Activation Wizard Error 0x4004F00C | Remove Old LTSC Key
Are you getting Error Code 0x4004F00C when trying to activate Microsoft 365 or Office 2021?
In this quick and easy tutorial, I will show you how to completely remove old, lingering Microsoft Office product keys (like old LTSC or KMS tokens) that are blocking your new Microsoft 365 subscription from activating. This common issue happens when old license data gets stuck in your Windows registry, but it can be fixed in just a few minutes using the Command Prompt!
📌 COMMANDS USED IN THIS VIDEO:
(Make sure to run Command Prompt as an Administrator!)
Step 1: Navigate to the Office installation folder
cd "C:\Program Files\Microsoft Office\root\Office16"
(Note: If you are using a 32-bit version of Office on a 64-bit Windows, use cd "C:\Program Files (x86)\Microsoft Office\root\Office16" instead).
Step 2: Display your currently installed hidden keys
cscript ospp.vbs /dstatus
(Look for the line that says "Last 5 characters of installed product key" and note those 5 characters down).
Step 3: Uninstall the old product key
cscript ospp.vbs /unpkey:XXXXX
(🚨 IMPORTANT: Replace the "XXXXX" with the actual 5-character key you found on your screen in Step 2).
⏱️ TIMESTAMPS:
0:00 - The Problem: Error Code 0x4004F00C
0:28 - Opening Command Prompt as Administrator
1:07 - How to check current hidden Office licenses
1:57 - Finding the 5-digit product key to delete
2:41 - Uninstalling the old Office LTSC product key
3:06 - Verifying Microsoft 365 is successfully activated
💡 Did this fix your issue?
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