Error Code 0xc004c008 - What is it?
This specific Windows 8.1 or Windows 10 error code has to do with the number of times you can use your license number to install windows programs on computers. All windows activation codes are licensed to be used one time for a device, to control piracy, but what happens when your PC crashes, or you have to change a hard drive component and are forced to re-install Windows Operating System. Luckily, there is an easy fix for this issue.
Solution
Error Causes
Basically, when you need to re-install the Windows operating system that you have previously bought and installed on another computer an error code will be displayed with a message telling you that the activation server determined that the specific key could not be used for activation. This occurs because the key has already been used on that computer, or a different one, to install operating systems. There are a few easy fixes for this issue, and most of them should be easily completed on your own.
Further Information and Manual Repair
There aren’t many explanatory ways to repair Error Code 0xc004c008. Below are two methods to go about addressing this issue.
Methods 1:
- The first step is to open the “Run” Window. You can do this in two ways. First, press the “Window” key and press the “R” key simultaneously. This will open the “Run” menu. Or you can start the “run” window by going to the Start menu and selecting Run.
- In the Run window type “SLUI 4” and click enter.
- A Phone Activation window will open up, after which you'll need to select a few options.
- First chose the country in which you registered the product for the first time.
- Choose your country and a phone number will be displayed specific to your choice. You will now need to call the number provided.
- After you’ve dialed you will be prompted to write your “Installation ID”. Type your “Installation ID” on the phone.
- After that step, you will be asked how many copies of Windows have been installed using this license. Choose “1”, should anything else be chosen but “1”, this will not work.
- After the process is completed, you will be given a confirmation ID and should be able to proceed as normal with installation. You will have a workable product key again.
- Install whatever copy of the Windows Operating System you are attempting to with the new product key.
Method 2:
If the first method did not work, the only other option is to call Microsoft and walk through the process with a technician. To do this, dial “1-800-936-5700”. Explain the error that you received and the steps in the update process during which it was displayed. The technician will be able to walk through the steps from getting a new product key to finishing the installation.
If you're not a tech-savvy individual but would like to solve this problem without the aid of a technician, download a powerful automated tool to fix error code 0xc004c008.
The true cause is that there is no working Border Gateway Protocol (BGP) routes into Facebook's sites. BGP is the standardized exterior gateway protocol used to exchange routing and reachability information between the internet top-level autonomous systems (AS). Most people, indeed most network administrators, never need to deal with BGP.
Cloudflare VP Dane Knecht was the first to report the underlying BGP problem. This meant, as Kevin Beaumont, former Microsoft's Head of Security Operations Centre, tweeted,
"By not having BGP announcements for your DNS name servers, DNS falls apart = nobody can find you on the internet. Same with WhatsApp btw. Facebook has basically de-platformed themselves from their own platform."
Many people are very annoyed by this and with the fact that they cannot use their social media platforms but it seems that Facebook employees are in even bigger annoyance as it was reported that Facebook employees can't enter their buildings because their "smart" badges and doors were also disabled by this network failure. If true, Facebook's people literally can't enter the building to fix things.
Reddit user u/ramenporn, who claimed to be a Facebook employee working on bringing the social network back from the dead, reported, before he deleted his account and his messages:
"DNS for FB services has been affected and this is likely a symptom of the actual issue, and that's that BGP peering with Facebook peering routers has gone down, very likely due to a configuration change that went into effect shortly before the outages happened (started roughly 1540 UTC). There are people now trying to gain access to the peering routers to implement fixes, but the people with physical access is separate from the people with knowledge of how to actually authenticate to the systems and people who know what to actually do, so there is now a logistical challenge with getting all that knowledge unified. Part of this is also due to lower staffing in data centers due to pandemic measures."
Ramenporn also stated that it wasn't an attack, but a mistaken configuration change made via a web interface.
Both BGP and DNS are down, the "connection to the outside world is down, remote access to those tools don't exist anymore, so the emergency procedure is to gain physical access to the peering routers and do all the configuration locally."
Technicians on site don't know how to do that and senior network administrators aren't on site.
It seems that it will all be down for a couple of more hours before the issue is resolved. 
Interesting information has come out from Microsoft, Windows 11 dark theme will include a different sound theme from its standard light one.
When in dark mode on Windows 11, the system sounds generally become softer, and they echo a bit, creating a more soothing experience that matches the overall look and feel of the dark mode. Flipping back to light mode brings the system sounds back to their normal level.
However, even though the light model has slightly louder sounds than the dark mode, Microsoft has taken great care to make sure the audio is more soothing, according to a report from CNBC.
The designers of Windows 11 took inspiration from an approach called calm technology. Microsoft’s Christian Koehn and Diego Baca wrote about calm technology in a post on Medium. In it, they said, “Windows 11 facilitates this through foundational experiences that feel familiar, soften formerly intimidating UI, and increase emotional connection.”
According to a Microsoft spokesperson in a statement to CNBC, “The new sounds have a much rounder wavelength, making them softer so that they can still alert/notify you, but without being overwhelming.” 
Click on command prompt (admin)
Type in command prompt following:
Microsoft office has two major packages, an online one, and an offline version. The online version of the course is Office 365 that requires a monthly subscription and it is always regularly updated and maintained. Another version is more of a typical old school application, install it and use it, no constant internet connection is required and no monthly subscription is required, buy once and use it.
The last version of buying it once and use it was Office 2019 and after two years we are going to receive a new version soon. Microsoft has set its release date for October 5th of this year and as always it will feature the current latest version of office applications and one-time purchase.
The new office will support dark mode and other improvements tied to the new Windows 11 and some specific features tied to Office itself. 