Installing Multisite on WP keeps failing

I've included the line define('WP_ALLOW_MULTISITE',true); and got the Network link under Tools. I followed all the rest of the instructions to change the config file and the .htaccess file. I end up with a message that the database is corrupted and instructions to add another line to the config file to allow automatic repair. This I do but end up with a list of things that cannot be repaired.

Any advice please?