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[Fly82]

I have moved flat, WiFi on, but won’t accept any of my Hotmail login details so can’t start computer?? 

[savvy2]

moved to new home (flat , home , apartment)

who owns the router, did move that too and not ask your ISP to set all that up first?

no country told UK we are USA , what ISP? is this.  Internet service provider,   lots there are.

I guess you mean all things at home are wifi dead, not just one thing, so if that is true it is all about ISP and your router.

At my home I own my router and setting are my job,  I access the router and set up my SSID, and PW.

then connect, 

no router told. maker or model or if own by ISB or leased or owned by you.  some are locked out and only the ISP can help.

on some new homes , the router has sticker on the back with wifi credentials in plain site, look there, or call ISP

day 1 in any new home you need to decide what ISP you want and call them.

PC runs windows 10 ,? not told

if yes, is taskbar right side showing internet dead if yes it is. bingo call ISP.