Here's the info to get you back in to your account as quickly as possible.
First, try the easiest thing: if you remember your password but it isn't working, make sure that Caps Lock is turned off and that your email address is spelled correctly, then try again.
If your password still isn't working, it's time to reset your password.
Click this link: Reset your password.
Choose the reason you need your password reset, then click Next.
Enter the email address you used when you made your Microsoft account. This could be any email address, or an email ending in a Microsoft domain like hotmail.com or outlook.com.
Enter the characters you see on the screen (this lets us know you're not a robot), then click Next.
If you've added security info to your account, we'll send a one-off code to the alternative phone number or email address you gave us. After you've entered that code on the next screen, you'll be able to make a new password.
If you don't have or can't get to your security info (your alternative phone number or email address), click I didn't get a code when you're prompted for a code at sign-in, or I don't have access to these when you're resetting your password, then follow the instructions.
You may be asked to fill in a security questionnaire, you'll be asked for info like the subject lines of emails you've recently sent from your account, your date of birth, credit card info and other details only you would know. There may be a 30-day waiting period to get full access to your account. Learn more about security info here: Security info & security codes.
If you've taken the extra security step of turning on two-step verification, some apps and devices will tell you your password is incorrect, because they haven't been updated to prompt you for a security code. Instead of your usual password, you'll need to use an app password to get in. Learn more here: App passwords and two-step verification.
Email Microsoft support
Chat with Microsoft support