Safety & Privacy

User Accounts and Safely Sharing a Computer

Create separate accounts, understand administrator privileges, and protect files on a shared device.

By Graham T. AlderwickBeginner guideReviewed July 26, 2026

Separate user accounts reduce accidental changes and keep each person's files, browser data, and settings apart.

What you will be able to doUse the ideas on this page to complete practical tasks and make safer choices on an everyday computer.

Standard and administrator accounts

An administrator can install system-wide software, change important settings, and manage other users. A standard account can perform everyday work with less ability to alter the entire computer. Use administrator permission only for a known task.

Separate accounts

Each regular user should have an individual account rather than sharing one login. This separates documents, browser profiles, preferences, and recent activity. Guest or temporary access can be useful for occasional visitors when supported.

Sign-in protection

Use a password or PIN and lock the screen when leaving the computer. A PIN may be tied to one device, while an account password can work across services; they are not always interchangeable. Biometric sign-in adds convenience but should have a secure fallback.

Before giving away or repairing a device

Back up files, sign out of accounts, remove saved payment information, and follow the operating system's secure reset procedure before sale or donation. For repair, ask what access is required and remove highly sensitive data when practical.

Quick skill check

  • Give regular users separate accounts
  • Use standard access for everyday work
  • Lock the screen when away
  • Know which account has administrator rights
  • Back up and reset before disposal

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