***Change a user's account type***
-Click on Start then search User Accounts and open it.
-Click Manage User Accounts. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
-On the Users tab, under Users for this computer, click the user account name, and then click Properties.
-On the Group Membership tab, click the group you want the account to be in, click OK, and then click OK again.
*Windows requires at least one administrator account on a computer. If you have only one account on your computer, you can't change it to a standard account.