What error message exactly do you get and when?
The usual thing that happens after an update is that if you shutdown you get a "Don't turn off. Processing updates" from 0% to 30%, and then at boot the same but going from 30% to 100%, and then you can login. If in stead of being able to login you get an error message, I wouldn't call that "when starting the laptop".
And then if I go in the Settings app to Windows update it shows what updates have been done lately and if they succeeded or failed.
So please tell a little bit more about what happens and what the Settings app shows about it.
My windows laptop receives notifications on windows updates. I have tried many times to update. when i connect it to Internet automatically start to update. Even though it shows 100% progress i receives the error message when i start the laptop. what could be the reason.

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