Windows 10: how do I confirm someone gives me a valid Microsoft id number?

I think I was a victim of ransomware. how do I confirm two people gave me real Microsoft employee numbers?

:)

 

Product ID number only 20 alphanumeric characters - valid program

Can Microsoft determine if my computer is running a valid Windows 10 program if I only have a product ID number of 20 alphanumeric characters not a 25
alphanumeric Key number?

 

Is this phone number a valid Microsoft number?

Please tell me if this number is a valid Microsoft phone number: 1-844-386-8965.

 

10 Home Confirm your phone number rejecting valid US number.

What is the specific format Windows 10 Home setup demands a USA phone number to be in when entered on the Confirm your phone number screen?

It IS a valid number, it's the number the owner of this laptop used when she called me when she asked me to wipe it and do a clean install. 208549**** (obviously I'm entering the digits, not asterisks) With United States (+1) selected in the dropdown above.

No standard method of formatting a US number is accepted. (208)549-**** (208) 549-****. I even tried +1(208) and +(1)(208) and (+1)(208) at the start. All rejected.

If there is some double super secret special way of formatting the number that is expected here, then at the very least that field should be pre-populated with an example. Better yet would be for it to *force it* to be correct by rejecting all user input other than digits and formatting it itself.

Most websites do this. Microsoft's own products used to do this when entering a keycode. But they can't do it for a phone number?

I never use a Microsoft Account on MY computers. The only reason I'm attempting to do so on this one is because the owner most likely had one due to it being Windows Home and how it forces a Microsoft Account if you don't know to skip connecting to the internet until later.