Hello guys,
if someone of you see a red color message "WARNING: Unfinalize Software" on the left upper corner of the screen of your oscilloscope during the system loading, and it appeared after upgrade the firmware (to original one, not patched - it happened to me after updating from v.2.12 to v.2.65, and it's kinda weird), you can "clear" this message sending the next command to your scope using software "Keysight IO Libraries Suite":
:SYST:PROD:SEAL
Maybe it will help someone.