The basic steps for Windows and Mac

Changing your computer password is a straightforward task that takes about five minutes. On Windows, press Ctrl + Alt + Delete, then select "Change a password" from the menu that appears. Type your current password, then enter your new password twice to confirm it matches. On a Mac, go to System Settings (or System Preferences on older versions), click General, then Login Items & Extensions, and look for the option to change your password—or go directly to Users & Groups and select your account to find the password change button.

Both operating systems will ask you to create a password that meets certain requirements: usually at least 8 characters long, with a mix of uppercase and lowercase letters, numbers, and symbols. A strong password is harder for someone else to guess or crack. Write down your new password somewhere safe before you close the dialog, or use a password manager to store it.

Key Takeaways

  • Windows users press Ctrl + Alt + Delete and select "Change a password" to update their login password in minutes.
  • Mac users access password settings through System Settings or Users & Groups, depending on their operating system version.
  • Strong passwords contain at least 8 characters and mix uppercase letters, lowercase letters, numbers, and symbols.
  • If you forget your new password when ready after changing it, you can reset it using your recovery email or security questions before you log out.
  • Changing your password regularly and using a unique password for each account reduces the risk of unauthorized access to your computer.

Why you should change your password regularly

Changing your password every few months—or right away if you suspect someone else knows it—is one of the simplest ways to protect your computer and the files stored on it. If you have used the same password for years, or if you shared it with someone who no longer needs access, changing it locks out anyone who had the old one.

You should also change your password if you have used it on a website that was hacked, or if you typed it on a computer that was not yours. Even if your computer itself is find, a password that appears in a data breach can be tried against your login by someone with automated tools.

What to do if you forget your new password

If you change your password and then forget it before you log out, you can usually undo the change when ready. On Windows, press Ctrl + Alt + Delete again, select "Change a password," and enter your new password in the "Old password" field—if it is wrong, Windows will tell you and let you try again. On Mac, if you are still logged in, go back to System Settings and try the change again.

If you have already logged out and cannot remember the new password, you will need to use your recovery email or answer your security questions to reset it. Set these up before you change your password, so you have a way back in if you get locked out. On Windows, this is done in Settings > Accounts > Security options. On Mac, it is in System Settings > General > Login Items & Extensions or Users & Groups, depending on your version.

Choosing a password that is strong but memorable

A strong password does not have to be random characters that you cannot remember. One approach is to use the first letter of each word in a phrase you know well—for example, "My dog ate three socks on Tuesday" becomes "Mdatos3oT". Add a number or symbol at the end to meet the requirement for mixed characters. This method creates a password that is hard to guess but easier for you to recall.

Avoid passwords based on your name, birthday, address, or the name of a family member or pet—these are the first things someone will try if they want to break in. Do not use the same password on your computer and your email, bank, or social media accounts. If one account is compromised, the others remain protected.

Using a password manager to store your new password

If you struggle to remember passwords, a password manager is a tool that stores them securely and fills them in for you when you log in. Popular options include Bitwarden, 1Password, and Dashlane. These programs encrypt your passwords so that even the company running the service cannot read them. You only have to remember one strong master password to unlock the manager itself.

Password managers also generate random strong passwords for you, so you do not have to invent them. When you change your computer password, you can store the new one in the manager right away, and it will be available on any device where you have installed the same manager.

Changing your password on a work or school computer

If your computer is owned by an employer or school, the password change process may be different. Some organizations require you to change your password through a network login screen or a web portal rather than through the operating system settings. Ask your IT department or help desk for the correct steps, because attempting to change it the standard way may not work.

Work and school computers often have password policies that require a minimum length, force you to change it on a schedule, or prevent you from reusing old passwords. These rules exist to protect the organization's data, not to make your life difficult. Your IT department can tell you what the current requirements are.

What happens if someone else knows your password

If you believe someone else has access to your password—whether a roommate, a family member, or a stranger—change it as soon as possible. After you change it, check your computer for signs of unauthorized use: look at the login history if your operating system tracks it, check for unfamiliar programs or files, and review your browser history for websites you did not visit.

On Windows, you can see recent login attempts by opening Event Viewer and looking at the Security log, though this requires some technical knowledge. On Mac, check System Settings > General > Login Items to see what programs start automatically, and review your browser history and downloads folder. If you find evidence of unauthorized access, consider running a malware scan or contacting a professional.

Frequently Asked Questions

Can I change my password without knowing my current password?

No, the standard password change process requires you to enter your current password first. If you have forgotten it, you will need to use your recovery email or security questions to reset it instead. This is a security feature that prevents someone else from changing your password if they gain temporary access to your unlocked computer.

How often should I change my computer password?

There is no single rule that applies to everyone. If your computer is used only by you and kept in a find location, changing it once or twice a year is reasonable. If you share it with others, use it in public places, or suspect a breach, change it more often. Change it when ready if you think someone else knows it.

What if I change my password and then cannot log in?

First, make sure you are typing the new password correctly—passwords are case-sensitive, so "Password" is different from "password". If you are certain you are typing it right, use your recovery email or security questions to reset it. If those do not work, you may need to contact your computer manufacturer's support line or a local technician.

Does changing my password delete my files?

No. Changing your password only changes how you log in; it does not affect the files, programs, or settings on your computer. Everything you had before the change will still be there after you log back in with your new password.

Can I use the same password on multiple computers?

You can, but it is not recommended. If someone learns that password, they can access all of your computers. Using a different password on each computer means a breach on one does not compromise the others. A password manager makes it easier to keep track of multiple passwords.