0xC004C020-windows activation error

This article describes an error code 0xC004C020. There are cases which have been discussed related to product activation and licensing related issues due to the hardware changes. If more no of activation are being done using the same product key, it may cause windows product activation issues.

0xC004C020

Applicable to the following Operating systems:-

  • Windows 7
  • Windows 8/8.1
  • Windows 10
  • Windows server 2008
  • Windows server 2012

More about 0xC004C020 windows update error:-

Another code explained along with this above error code is 0xC004B008. If the activation server denies the activation code entered, this could result in the above error code 0xC004C020. Common issues related to activation are an unauthorized key entry.

0xC004C020 troubleshooting:-

Basic troubleshooting start with the checking of system date and time. There could be network challenges due to Intermittent connectivity issues. If the time zone is set incorrectly, the system cannot be recognized by Microsoft servers. Make it your local time zone from where you are trying to activate Office or Windows.

In other words, the activation keys are blocked, try to take the assistance of a technician here. So that we can track the product keys on Microsoft Product code activation pages to verify the validity.

Few troubleshooting steps suggest the following:

  1. Clean temporary files
  2. Clean booting of your computer
  3. Run a sfc scan
  4. Ping the network stats with the Microsoft Servers.
  5. Make sure no proxy behind your internet connection.
  6. Repair your program or Operating systems.

Clean temporary Files:

  • Open Run (windows key + R KEY)
  • Type in %temp% and press enter key

temp files deletion

  • Select all (CTRL+A) and delete all files (SHIFT +DELETE )

Clean booting of your computer:

  • Open Run command window (windows key + R)
  • Type msconfig and press enter,

msconfig in run

  • Goto General Tab and choose “selective startup ” from the options
  • Uncheck “load startup items“,

msconfig load start up items

  • Then goto “services “tab from the top menu selection,
  • Tick on Hidel all Microsoft Services and then click on Disable all tab

msconfig disable services

Click the Startup tab.Click on Open Task Manager.

  • Under the status bar, right-click each enabled startup item and select Disable and OK.

msconfig disable startup

  • Now restart your computer,

After completing your troubleshooting, restore your system by doing exactly opposite to the above steps like Enabling all services in 5th step, and again in the 8th step enable all services that you want to start automatically (like onenote, skype,email etc ) when your computer starts.

Run SFC scan:

  • Open cmd as administrator,
  • Type in sfc /scannow and press enter, then wait for its completion.

Video tutorial of SFC scan for 0xC004C020 troubleshoot;

 

It will take some time to finish the scanning process , if it shows any errors in the results you need to do proper action suitable to the error.

The sfc /scannow command will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder at %WinDir%\System32\dllcache.
The %WinDir% placeholder represents the Windows operating system folder. For example, C:\Windows.

Note Do not close this Command Prompt window until the verification is 100% complete. The scan results will be shown after this process is finished.

Ping the network stats with the Microsoft Servers:

It is a preliminary check to test the network when comes to a click to run versions. Office installation or updates would need an open network to make the client receive the updates.

It can be tested using the command prompt.

CMD ADMIN IN WINDOWS

once the command prompt window opens, type the following command line

nslookup office365.com

you can replace office365 with your versions.

The resultant should be the address of Microsoft servers.

Make sure no proxy behind your internet connection:

Proxy connections are used to hide the original IP address from hackers. This internet protection mode is widely used by the company networks. The proxy server should be configured by the network admins to route the office server IP address. if not, the proxy should be temporarily disabled.

Repair your program or Operating systems:

In windows 10 Resetting your computer is a simple task, Follow the step to repair your computer operating system.

  • Goto windows search bar left side bottom corner (Cortana search bar now)
  • Type in “Reset” you can directly find Setting for reset your PC.
    reset pc in windows 10
  • Then under the RESET PC, click on get started button to proceed.
  • There are two options to keep your files and complete clean. (You must take backup of your desktop files, pictures, downloads, documents before proceeding to complete clean.)reset pc options in win10
  • After reset, you may do updates cleanly without any issue. This resetting process takes time so please do it when you don’t have any urgent work with your computer.

Also, it is applicable to Microsoft Office and it’s versions. If the programs are provided to you by IT persons in your company, please recall the previous emails and check your product keys. In case if it is purchased for personal use, cross check if the programs are showing their validity under your Microsoft account.

If you have any trouble with username or password, make sure to use the Forgot password to fix the forgotten Microsoft Passwords on the page.

For any additional technical support, please initiate a chat with our Support Professionals, We are experts in resolving the Microsoft Office or Windows related issues.

Chat with our technician to fix your windows activation  issues Now!

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Related issues to windows activation error code 0xC004C020 :

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