Hello.
Such message can suggest that the database file is completely damaged:
"database file appears corrupt (C:\WINDOWS\TEMP\FB_TABLE_K1ED8U)
wrong page typepage 61 is of wrong type (expected index root, found data)"
but as you can see, this is about temp file, not the database file itsself.
I have seen such messages already few times on different servers.
Best regards,
Tomek.