If you've forgotten your Windows password and can't log into your PC, you're not out of luck. There are a number of ways to reset or change a lost Windows password, and we'll cover some of the most effective ones here.If you're running Windows 10, 8, or 7, you can use a Microsoft account to reset your password. All you need is access to another PC or your mobile phone. Just head to the Microsoft account password reset page, enter your email address, click next, and then follow the instructions.If you're running an older version of Windows, or if you don't have a Microsoft account, you'll need to use a third-party tool to reset your password. One of the best and most popular tools for this is Ophcrack. It's a free, open-source program that can crack most Windows passwords in a matter of minutes.To use Ophcrack, you'll need to create a bootable USB drive or CD. Once you've done that, just boot from the drive and follow the instructions. Ophcrack will automatically detect and crack your Windows password.If you don't want to use a third-party tool, you can also reset your password by using the built-in Administrator account. This account is disabled by default, but you can enable it by booting into Safe Mode. Once you're in Safe Mode, just head to the Control Panel and enable the Administrator account.Once you've enabled the Administrator account, you can log into it and reset your password from the User Accounts section.If you're still having trouble resetting your password, you can always contact Microsoft support for help.No matter what method you use, resetting your Windows password is a pretty straightforward process. Just make sure you have a backup plan in place in case you forget your password again in the future.