When I purchased my computer I was using an email adress that is no longer valide. I did register another email but when I try to install a software on my computer it shows my old e mail and wants me to put in my paswword. But I don't remember that password.
If you're talking about the email address you used to create the login for Windows, we can't help you with that, as that is a Microsoft issue, not an HP issue.
If you use a Microsoft account for your Win10 access (you would know that because the login screen shows either a pin code or an email address), then you can go to the Microsoft account reset website: https://account.live.com/password/reset -or - go to the Sign in Microsoft Account website: https://login.live.com/
Then follow these instructions: 1) Click/tap on the Can't access your account link 2) Select why you can't sign into your account and click/tap on Next 3) Enter the email address of your Microsoft account, type in the characters displayed onscreen, and click/tap Next 4) Select how you would like to get your security code to verify your identity, click/tap Next 5) Enter your security code sent using the method selected in 4) above, click/tap Next 6) If you have enabled tw0-step verification, repeat steps 4) and 5) above using a different method to send you a different security code 7) Type in a new password, click/tap Next 😎 Your Microsoft account has been recovered -- click/tap on Next -- and you're done
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