Windows10 New Updates are not Installing in My PC. Can you guys please suggest me the process to do the activation in my windows 10.

What messages/feedback are you getting to tell you what failed?

You may want to count yourself lucky. If an update fails to install, DO NOT FORCE IT IN. I've seen folk end up having to start over.

These usually work themselves out as the update failure reports back to Microsoft and it might be reinssued.

-> To carry on here, tell which update failed such as KBnnnnnnn where nnnnnnn is the number so others and you can research.

Finally updates are not activations. Please don't confuse those two things.

Mine has been like this since they give out the last update which deleted files through their mistakes and now the update what’s pending says I’ve errors

Reminds me of my experience with the 2017 fall update which refused to install until I uninstalled software which had never been put on my computer.

The updates must be off. Turn them ON from the settings.

Did you try the following in a command prompt?
sfc /scannow

The command repairs Windows system files. IMPORTANT: Open the command window as an Administrator.