Thanks.Open file explorer
Scroll down to "This PC", right-click on C disk, select "Properties"
On new pop-up, click "Disk Cleanup"
On new pop-up, click "Clean up system files" (You'll need to put in your administrator password - if you are running an admin account as your day-to-day account then BAD! Set up a new regular user account and use that...*)
After a bit of a wait the pop-up will reload, and there will be an option "Windows Update Cleanup" which is what you want.
* Running an admin account as your day-to-day account makes your machine vulnerable to malware, ransomwear & etc. Let's just say that I know of several major companies who've been badly hit by malware and this was a major contributing factor!
I run my admin as my main account. I like to live