Have you remembered to take a backup of all folders and files on your server?
If not then it is now!!


On the next page, all MySQL error appear but DO not panic, error with the following numbers can usually be ignored: 1046, 1054, 1060, 1091

They show only that your tables in the database is either up-to-date, or not exist
(f.x. a module no longer exists), etc. etc.