HP Sure Start is a security and resilience solution that protects and recovers critical firmware from attacks and corruption.
The message you’re seeing from HP Sure Start indicates that it has detected unauthorized modifications or anomalies in the system firmware, which could be caused by a security threat or a potential firmware issue.
I shall suggest you reset BIOS to default.
Go to the HP Support website, and download the latest BIOS or firmware update for your specific ZBook model.