Safely and completely remove any unwanted TEMP or other users in Windows 10

First, log in with the proper User Name (Account) and make very certain you have logged in to your own account and not a temporary account.

Do not worry excessively about Windows choice of your User Profile name. It will work fine.

Deleting User Profiles in Advanced Settings:

Then from your own Account, Start, Settings, About. Scroll down the right hand side and select "Advanced System Settings"

In Advanced System Settings, select the Advanced Tab and click on the User Profile Settings.

Delete whatever profiles you set up and do not need.

If need be, set up a brand new account to keep, log into that and clean up old accounts.

Deleting Temporary or other User folders in Explorer:

In that new account, and making sure no excess Profiles, you can use Windows Explorer to delete old profiles in USERS.

Open Windows Explorer in an Admin Account that is not one of the USER Profiles you wish to delete. Navigate down to USERS and delete the Profiles you wish. You will need to OK UAC on deletion most likely.

It is safe to delete USER folders that are no longer in use (the Accounts are not used.)

..