Error Code 0xC004C770 – What is it?
If the Error Code 0xC004C770 popped up on your computer during your activation of the Windows 10 software, don’t worry. This is a fairly common error, especially for people who own more than one computer upon which Windows 10 is installed and activated. The gist of this error code is that the product key that you have entered has already been claimed or used on a different computer. Because there are limitations on the number of computers that can use any given license activation code or product key, this error code can arise when you have exceeded that limit. If you have a single-use license and have already entered the particular product key onto another machine, you may see this error come up during activation.
Both Error Code 0xC004C770 and Error Code 0x803FA071 arise from the same problem and the same steps can be used to resolve both error codes.
Solution
Error Causes
Error Code 0xC004C770 is likely to appear on your screen during activation of Windows 10 if you or anyone else in your organization have already entered in the product key used on another computer. If you have a multiple-use license, the product key that you are entering may already have been used for the maximum number of computers allowed under that license.
Further Information and Manual Repair
There are two basic methods for addressing the issues associated with Error Code 0xC004C770. These methods can easily be implemented by anyone who is comfortable interacting with the Windows Store from their computer, which makes the resolution of this particular error code fairly simple and straightforward.
If you are unable to complete the steps below or Error Code 0xC004C770 has not been resolved after following the guides below, contact a Windows technician who is familiar with the Windows 10 activation process to assist you in the process. You can also get in touch with the Windows technical support team to assist you in the process if needed.
Method One: Purchase A New Product Key from Windows
If you have already used the product key on another computer or have used it on the maximum number of allowed devices, you may need to purchase an additional product key for the computer with Error Code 0xC004C770. Product keys can be purchased physically from a retailer that sells Windows 10 software licenses or purchased directly from the Windows store.
To purchase a new product key directly from the Windows Store, follow the steps below:
- Step One: Select the Windows start button at the bottom of your toolbar. Click on “Settings,” then select the option for “Update and Security.”
- Step Two: Click on the “Activation” option.
- Step Three: In the menu that appears, choose the option to “Go to Store” and follow any on-screen instructions to finalize a purchase of the Windows 10 software and product key.
- Step Four: Use the new product key to complete the installation and activation of the Windows 10 software on your computer.
If you are unable to see the “Go to Store” option when you reach the “Activation” page, you may not be set as an administrator of your machine. In this case, get in touch with the support personnel from your company to complete the purchase, installation, and activation process on your computer.
Method Two: Attempt to Finish Activation via Phone
For users who have changed out parts of their computer’s hardware, like putting in a new motherboard or activating a new hard drive, you may have more success if you attempt activation through a phone.
In order to activate your copy of Windows 10 from your phone, follow the steps below:
- Step One: On your mobile device, open up the search box from the taskbar.
- Step Two: In the search box, enter the phrase “SLUI 04.”
- Step Three: Select the “SLUI 04” option that appears.
- Step Four: Follow the directions given on the screen to complete the activation process for your copy of Windows 10.
As with any error code resolution, if the methods above are not successful or if you are not comfortable with your ability to successfully complete the steps above, get in contact with a qualified professional who is trained in the Windows 10 activation process to assist you or download a powerful automated tool to get the job done.

If you are one of the mentioned users and for any reason, you do not wish to have a touchscreen-enabled then sit back and relax, we have you covered in this tutorial on how to fully disable touchscreen inside Windows 11.
Bad or good news, depending on your view comes from RIOT for their game Valorant. It seems that Riot has decided to enforce Windows 11 TPM 2.0 feature into Valorant running on Windows 11 and there is a rumor that it will be de facto standard and that it will move to Valorant in general no matter on which system it runs.
Furthermore, there is a rumor circling around that other developers are also talking about implementing TPM 2.0 requirements so they can harvest advanced security features of Windows 11 in order to prevent hacks and other cheats in their games.
This is an interesting point to stand on, on one side, sure, advanced features that will prevent cheating and hacking is a great thing. On other hand denying access to many computers that do not support TPM 2.0 and removing them from the game can be a permanent loss of customers and therefore loss of money. It is a risk to be sure and I am not really sure that alienating gamers is a good choice for long-term income, especially when you will be able to install Windows 11 on an unsupported PC as stated by Microsoft.
We will all see how this Riot decision will reflect on their business, as not a big Valorant player myself I am not impacted too much with this decision, but it will be interesting to see if others will indeed go with this trend or they will decide to wait a while until much more PC’s are upgraded.
History of Commodore
With sales booming and the early reliability issues with the hardware addressed, software for the C64 began to grow in size and ambition during 1984. This growth shifted to the primary focus of most US game developers. The two holdouts were Sierra, who largely skipped over the C64 in favor of Apple and PC compatible machines, and Broderbund, who was heavily invested in educational software and developed primarily around the Apple II. In the North American market, the disk format had become nearly universal while cassette and cartridge-based software all but disappeared. So most US-developed games by this point grew large enough to require multi-loading.
At a mid-1984 conference of game developers and experts at Origins Game Fair, Dan Bunten, Sid Meier, and a representative of Avalon Hill said that they were developing games for the C64 first as the most promising market. By 1985, games were an estimated 60 to 70% of Commodore 64 software. Over 35% of SSI's 1986 sales were for the C64, ten points higher than for the Apple II.
Everything was great for Commodore but the industry was moving forward and by the year 1988, PC compatible computers were stated to be the largest and fastest-growing home entertainment systems pushing C64 on to second place. Also, Nintendo’s gaming system has started to take hold in the world with amazing 7 million systems sold in 1988 only.
By the year 1991, many developers exited the gaming market for Commodore 64 home computer system and its popularity started to fall due to lack of software and not so many hardware changes.
Commodore announced that the C64 would be finally discontinued in 1995.
However, only one month later in April 1994, the company filed for bankruptcy. When Commodore went bankrupt, all production on their inventory, including the C64, was discontinued, thus ending the C64's 11 and a half year production.
Zak McKracken and the Alien Mindbenders

If you are not keen on spending money for reliving and checking games or software of C64 here are some links to help you to at least experience part of it completely free.
Commodore 64 