My HD crashed and I can't start MySQL

I am on Windows 8, my SSD got corrupted and I installed Windows on a new drive. I had before MySQL 5.6.12, now I installed 5.6.17 and tried to move the entire data dir. The location of the MySQL installation is the same as before. But when I start it I get the following error:

2015-02-23 17:44:44 12492 [Note] Plugin 'FEDERATED' is disabled.
wampmysqld64: Incorrect information in file: '.\mysql\plugin.frm'
2015-02-23 17:44:44 12492 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
2015-02-23 17:44:44 12492 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-02-23 17:44:44 12492 [Note] InnoDB: The InnoDB memory heap is disabled
2015-02-23 17:44:44 12492 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2015-02-23 17:44:44 12492 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-02-23 17:44:44 12492 [Note] InnoDB: Not using CPU crc32 instructions
2015-02-23 17:44:44 12492 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-02-23 17:44:45 12492 [Note] InnoDB: Completed initialization of buffer pool
2015-02-23 17:44:45 12492 [Note] InnoDB: Restoring page 0 of tablespace 0
2015-02-23 17:44:45 12492 [Warning] InnoDB: Doublewrite does not have page_no=0 of space: 0
2015-02-23 17:44:45 12492 [ERROR] InnoDB: space header page consists of zero bytes in data file .\ibdata1
2015-02-23 17:44:45 12492 [ERROR] InnoDB: Could not open or create the system tablespace. If you tried to add new data files to the system tablespace, and it failed here, you should now edit innodb_data_file_path in my.cnf back to what it was, and remove the new ibdata files InnoDB created in this failed attempt. InnoDB only wrote those files full of zeros, but did not yet use them in any way. But be careful: do not remove old data files which contain your precious data!
2015-02-23 17:44:45 12492 [ERROR] Plugin 'InnoDB' init function returned error.
2015-02-23 17:44:45 12492 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2015-02-23 17:44:45 12492 [ERROR] Unknown/unsupported storage engine: InnoDB
2015-02-23 17:44:45 12492 [ERROR] Aborting

mysql_upgrade fails with FATAL ERROR: Upgrade failed

Thank you very much for your time.