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Hi @baranee dharan
Thanks for posting your question in Q&A forum.
To assist you better, I will need more information.
May I know what error showed up when the installation failed?
Which Windows version are you updating to?
Here is a document to troubleshoot when updating Windows
Troubleshoot problems updating Windows - Microsoft Support
This is a common fix, please let me know if it works for you.
If not, we can figure out another approach.
Please provide more information for better assistance.
Thanks for your cooperation.