Hello Matus Mydliar
Welcome to the Microsoft Community.
It sounds like there's something wrong with your infrared facial recognition, and HP recommends taking it to after-sales. But you are not sure if it is a hardware problem.
You can create a new user account. Creating a new user account means creating a brand new configuration file. Then test whether the facial recognition is normal. If it still doesn't work, it's probably a hardware problem.
You can create a new local account by following the steps below and switch to the newly created account to see if the function is normal. Because this cannot be ruled out due to the wrong configuration. Visit****Create a local user or administrator account in Windows - Microsoft Support****for more details.
- Create a local user account
- Select Start> Settings> Accountsand then select Family & other users. (In some versions of Windows you'll see Other users.)
- Next to Add other user, select Add account.
- Select I don't have this person's sign-in information, and on the next page, select Add a user without a Microsoft account.
- Enter a username, password, or password hint—or choose security questions—and then select Next.
- Change a local user account to an administrator account
- Select Start > Settings>Accounts.
- Under Family & other users, select the account owner name (you should see "Local account" below the name), then select Change account type.
- **Note:**If you choose an account that shows an email address or doesn't say "Local account", then you're giving administrator permissions to a Microsoft account, not a local account.
- Under Account type, select Administrator, and then select OK.
- Sign in with the new administrator account.
Note: If the new account is normal, please do not delete the old account before backing up the data of the old account to avoid any data loss.
If there is anything not clear or I can't understand your problem, please do not hesitate to let me know.
Best Regards
Patch - MSFT | Microsoft Community Support Specialist