I have HP BL 460 G8 blade server and I upgraded to ESXi 5.5u2 from ESXi 5.1 with VMware-ESXi-5.5.0-Update2-2068190-HP-5.76.36-Sep2014.iso
Before remediate the upgrade attached baseline, you need to do the recommendations in VMware KB: Upgrading an ESXi 5.x host through Update Manager fails with an error