Welcome Giovanni Jermy,
I'm sorry you're having trouble signing in to your Microsoft account.
To help narrow this down, could you let us know:
- Are you unable to sign in at Microsoft Account in a web browser, on your Windows 11 device, or both?
- Do you receive any specific error code or message when the sign-in fails?
- Have you recently changed your password or enabled two-step verification?
In the meantime, please try these quick checks:
- Open an InPrivate/Incognito browser window and try signing in at Microsoft Account.
- Verify that your internet connection is working and that the device date, time, and time zone are correct under Settings > Time & language > Date & time
- If you recently changed your password, restart the PC and try signing in again with the new password.
- If you're signing in through a browser, clear the browser's cookies and cache, then try again.
Looking forward to your update.