To delete a user account

To open Computer Management, click Start, and then click Control Panel. Click Performance and Maintenance, click Administrative Tools, and then double-click Computer Management. 

When you need to remove user accounts, it is a good idea to disable the accounts first. When you are certain that disabling the account has not caused a problem, you can safely delete it.

A deleted user account cannot be recovered.

The built-in Administrator and Guest accounts cannot be deleted.

Local Users and Groups overview

Change the password for a user

Create a new user account

Delete a user account

Disable or activate a user account

Modify a user account

Rename a user account