Windows 10: My HP with Win10 disappeared ! What to do now?

My HP with Win10 disappeared from my computer list. My Visa card, connected to this account, was blocked. I haven't sell or give to anyone my HP PC or password. What to do now?

:)

 

Win10/HP Pavillion - PIN "unavailable"

Using Win10 on an HP Pavillion Gaming Laptop

PIN went away. Now when I go into create a PIN I get "Something went wrong. Try again later". The step prior is: Start.>Settings>Accounts>Sign in Options>Windows Hello PIN and it reads "This options is currently unavailable - click to learn more". I
followed the steps suggested, but they don't work

Suggestions?.

 

What is the latest stable build of Win10 ?

Does the Win10 update's "keep my files":
1.) Remove Firefox Mozilla's saved user+pass list ?
2.) Remove HP laptop's pre-installed drivers & programs like: HP utility, HP cool sense and such...
3.) I have also a online-paid MsOffice 2013 and update probably removes it... Do I just pick the serial number and use it again ?

 

My audio output devices have disappeared from my HP laptop.

I have an HP laptop running Windows 10. My audio output devices have disappeared. Not just no devices installed, but no devices listed in Device Manager. Tried troubleshooting and still no devices found. Tried connecting USB speakers, but those were not
detected either.

Suggestions?