Windows login accounts generally fall into two categories - users and administrators (admin accounts). To make significant changes on your computer, such as performing a System Restore, or updating the operating system, requires an admin account.
You can have more than one Windows administrator account on your PC, however. And you can choose to upgrade a normal user account into an admin account.
Upgrade a Windows account to administrator
First, log onto your PC using an existing administrator account. You won't be able to change a user account to become an admin if you're logging in as the non-admin user - this change requires another admin account to authorise it.
Open the User Accounts settings by searching for user accounts in the Windows search bar then clicking User Accounts. Alternatively, click Control Panel > User Accounts > Manage User Accounts.
Click the Users tab, then under Users for this computer, find the account that you want to change. Click Properties > Group Membership. Change this to administrator.