I did. I tried a lot of things: I followed an advice to remove ibdata from C:\xampp\mysql\data. The error was still there, so I followed a suggestion to uninstall the MySQL Server 5.7 because it collides with the Xampp MySQL Server. But still it was unresolved. Finally, I removed ib_logfile0 and ib_logfile1 from C:\xampp\mysql\data and MySQL in Xampp was running, but I had an other issue: Whenever I logged in to phpmyadmin, I could view the DB that I had created, but not the tables that they consist. Also, I couldn't even create a new database. Every time I try, phpmyadmin just froze.
So, I uninstalled everything and reinstalled them again, and now I see the same error. The mysql_error.log shows:
2016-02-19 10:16:10 a20 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
2016-02-19 10:16:10 2592 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2016-02-19 10:16:10 2592 [Note] InnoDB: The InnoDB memory heap is disabled
2016-02-19 10:16:10 2592 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2016-02-19 10:16:10 2592 [Note] InnoDB: Memory barrier is not used
2016-02-19 10:16:10 2592 [Note] InnoDB: Compressed tables use zlib 1.2.3
2016-02-19 10:16:14 2592 [Note] InnoDB: Not using CPU crc32 instructions
2016-02-19 10:16:14 2592 [Note] InnoDB: Initializing buffer pool, size = 16.0M
2016-02-19 10:16:15 2592 [Note] InnoDB: Completed initialization of buffer pool
2016-02-19 10:16:26 2592 [Note] InnoDB: Highest supported file format is Barracuda.
2016-02-19 10:17:10 2592 [Note] InnoDB: 128 rollback segment(s) are active.
2016-02-19 10:17:10 2592 [Note] InnoDB: Waiting for purge to start
2016-02-19 10:17:10 2592 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.26-74.0 started; log sequence number 1835047
2016-02-19 10:17:11 4508 [Note] InnoDB: Dumping buffer pool(s) not yet started
2016-02-19 10:17:11 2592 [Note] Plugin 'FEEDBACK' is disabled.
2016-02-19 10:17:13 2592 [Note] Server socket created on IP: '::'.
2016-02-19 10:17:13 2592 [ERROR] Can't start server: Bind on TCP/IP port. Got error: 10048: Only one usage of each socket address (protocol/network address/port) is normally permitted.
2016-02-19 10:17:13 2592 [ERROR] Do you already have another mysqld server running on port: 3306 ?
2016-02-19 10:17:13 2592 [ERROR] Aborting
What should I do?