Cann not start server

[Ronald Fischer]

I have installed the Cygwin version of MySql and want to run the server for the first time. Running

mysqld

results in the following output:


151105 12:45:59 [Note] mysqld (mysqld 5.5.45) starting as process 9844 ...
151105 12:45:59 [Warning] Setting lower_case_table_names=2 because file system for /var/lib/mysql/ is
case insensitive
151105 12:45:59 [Note] Plugin 'FEDERATED' is disabled.
mysqld: Table 'mysql.plugin' doesn't exist
151105 12:45:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
151105 12:45:59 InnoDB: The InnoDB memory heap is disabled
151105 12:45:59 InnoDB: Mutexes and rw_locks use GCC atomic builtins
151105 12:45:59 InnoDB: Compressed tables use zlib 1.2.8
151105 12:45:59 InnoDB: Initializing buffer pool, size = 128.0M
151105 12:45:59 InnoDB: Completed initialization of buffer pool
151105 12:45:59 InnoDB: highest supported file format is Barracuda.
151105 12:45:59 InnoDB: Waiting for the background threads to start
151105 12:46:00 InnoDB: 5.5.45 started; log sequence number 1595675
151105 12:46:00 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306
151105 12:46:00 [Note] - '0.0.0.0' resolves to '0.0.0.0';
151105 12:46:00 [Note] Server socket created on IP: '0.0.0.0'.
151105 12:46:00 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't
exist


I therefore executed

mysql_upgrade

(though I don't understand, why I should upgrade, if I have it installed just now), and now get the error messages

Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
FATAL ERROR: Upgrade failed



What do I have to do in order to get the server running?