This short guide is intended mainly for Windows 8/8.1 users and to people who have no idea on how to fix this error, this may be applicable to Windows 10 users, i also expect readers here to have atleast attempted to activate their Windows with instructions given by MSGuides.
Here is the website for activating Windows 8/8.1 with CMD for those who needs a refresher: https://msguides.com/microsoft-software-products/newest-methods-activate-windows-8-8-1-free-without-software.html
Here is the link for Windows 10 as well: https://msguides.com/microsoft-software-products/2-ways-activate-windows-10-free-without-software.html
NOTES! FOR EVERYONE WHO IS EXPERIENCING KMS CONNECTION ISSUES I HAVE FOUND A SOLUTION! And we have two methods for it:
a. Always run the cmd or batch files as admin when activating, and also make sure you have a stable connection as said here: https://msguides.com/computer-tips/connection-kms-server-failed.html and finally...
b. Make sure you have a CLEAN PC, you dont know what this means? If you have used a kms activator on your PC before (KMSPico, Reloader etc) then there you have it! Such modifications can prevent you from connecting to the new kms server and fail it, the only solution to this is to either remove EVERY trace of the activator, clean your pc with sfc and DISM and run an antivirus scan on the whole computer, removing your installed key may also help but if incase it didnt, then refreshing your pc is only way, refresh is enough for most times but if you used a really aggresive activator then guess you have to reset.
So thats it, if youre lazy finding the activators trace files then refresh your pc, then follow the given guide again and/or make the batch file, thats it!
UPDATE: I have found some errors that are related to KMS connection error, and some of these problems are solved by messing around with the registry, here is an example from someone: https://community.msguides.com/d/67-cant-activate-microsoft-windows-non-core-edition-windows-10-pro/2
so feel free to try fix an error by searching it first guys, some fixes can be found on YouTube
I have activated my PC just now through this procedure, i also thought its not working, but when i realized i used an activator, i decided to refresh my PC and now i activated it legally and virus-free!
Hope this post will help those in need, welcome in advance folks and happy new year!