Husband is locked out of Microsoft account by AVG

How do I et my husbands's Microsoft account unlocked. He is signed in but cannot access his account. AVG popped up with a threat to the pc and he said to protect. His name was included in the threat.

Hello Jean, I apologize for the inconvenience caused. Could you please send us a screen shot of the threat you have received? Thank you

Hello Jean, I apologize for the inconvenience caused. Could you please send us a screen shot of the threat you have received? Thank you