Windows 10: POSSIBLE SCAM

i GOT A DIALOG BOX, FEATURING THE ms LOGO, TELLING ME MY COMPUTER WAS BLOCKED, NOT TO SHUT DOWN, AND PROVIDING A PHONE NUMBER FOR ASSISTANCE. i HAD TO GUESS: IF I SHUT DOWN AND WAS LOCKED OUT, THAT WOULD BE BAD, SO II CALLED THE NUMBER. AFTER WORKING ABOUT AN HOUR. THE TECHNICIAN, WHO SUPPOSEDLY WAS A PARTNER OF ms, HAD E RUNNING OK. I SAID I'D PAY ONLY AFTER I GOT AN INVOICE AND HAD CHECKED WITH ms. THEY RESISTED, BUT AGREED. I FILLED OUT THE ms FORM, BUT THREE HOURS LATER, NO REPLY YET. IT'S HAD TO TALK TO, OR EVEN CHAT WITH, A HUMAN BEING AT ms. ANYONE HAD EXPERIENCE WITH, 1 THIS PHENOMENON; 2 GETTING TO ms ABOUT IT?

:)