My HP laptop is suddenly locked;

[50 Shades Of Blue]

2. Scam

This is a scam. These are old methods to exploit the unsuspecting customers and sensitive information might be leaked including your computer and mail ID and other information being used for wrong purposes.

You should report this Scam to Microsoft @
https://www.microsoft.com/en-us/reportascam/

Another useful info on these
https://www.microsoft.com/en-us/safety/online-p...

As an additional precaution -

1. Use Defender / ESET Scan on your computer
a. Open Windows Defender > Virus & threat protection menu > Advanced Scan > Full Scan
b. Download ESET / Sysrescue and follow the instructions on the link - https://www.eset.com/us/download/tools-and-util...

2. Run Malware scan
Malware Bytes - https://www.malwarebytes.com/

https://answers.microsoft.com/en-us/windows/forum/all/computer-lock-message-from-microsoft-chatbot/699831e7-5235-4b98-962b-a200ee5a715a