Windows 11 laptop with password but not Bitlocker... how secure?

Title mostly says it... if you have a business laptop with Windows 11 and an account password, but Bitlocker is not enabled, how secure is this? In particular...

1. Is the data on the drive(s) easily accessible to someone in possession of the laptop? If so...
2. Can browser cookies on disk somehow be used to get access to logged-in web sites?
3. If passwords are stored with the password manager in the browser, are they easily accessed?
4. Are …

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