Your HealthVault Account

What are the system requirements to use HealthVault?
How much does HealthVault cost?
How should I set up my account to manage my family’s health?
How do I change my sign-in information?
How do I change my contact email address?
How do I close my HealthVault account?
I’m trying to sign in using the email address HealthVault sends mail to, and it’s not working. What’s going on?
Can I use HealthVault on my mobile phone or tablet?