我刚刚安装了一个用于Win64的XAMPP 7.3.6-2-VC15，当我安装它时，一切都很好，MySQL从控制面板启动没有错误，等等一切都ok。
重新启动电脑后，Apache 仍在工作，但 MySQL 拒绝启动！我尝试重新安装XAMPP，但还是一样。 MySQL 工作正常，重启后停止工作。
这是我有的几篇日志...
在控制面板中：
09:48:10 [mysql] Attempting to start MySQL app...
09:48:10 [mysql] Status change detected: running
09:48:11 [mysql] Status change detected: stopped
09:48:11 [mysql] Error: MySQL shutdown unexpectedly.
09:48:11 [mysql] This may be due to a blocked port, missing dependencies,
09:48:11 [mysql] improper privileges, a crash, or a shutdown by another method.
09:48:11 [mysql] Press the Logs button to view error logs and check
09:48:11 [mysql] the Windows Event Viewer for more clues
09:48:11 [mysql] If you need more help, copy and post this
09:48:11 [mysql] entire log window on the forums
并在日志文件中：
2019-07-02 9:48:10 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2019-07-02 9:48:10 0 [Note] InnoDB: Uses event mutexes
2019-07-02 9:48:10 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2019-07-02 9:48:10 0 [Note] InnoDB: Number of pools: 1
2019-07-02 9:48:10 0 [Note] InnoDB: Using SSE2 crc32 instructions
2019-07-02 9:48:10 0 [Note] InnoDB: Initializing buffer pool, total size = 16M, instances = 1, chunk size = 16M
2019-07-02 9:48:10 0 [Note] InnoDB: Completed initialization of buffer pool
2019-07-02 9:48:10 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=1834407
2019-07-02 9:48:10 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
2019-07-02 9:48:10 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2019-07-02 9:48:10 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2019-07-02 9:48:10 0 [Note] InnoDB: Setting file 'C:\xampp\mysql\data\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2019-07-02 9:48:10 0 [Note] InnoDB: File 'C:\xampp\mysql\data\ibtmp1' size is now 12 MB.
2019-07-02 9:48:10 0 [Note] InnoDB: Waiting for purge to start
2019-07-02 9:48:10 0 [Note] InnoDB: 10.3.16 started; log sequence number 1834416; transaction id 265
2019-07-02 9:48:10 0 [Note] InnoDB: Loading buffer pool(s) from C:\xampp\mysql\data\ib_buffer_pool
2019-07-02 9:48:10 0 [Note] InnoDB: Buffer pool(s) load completed at 190702 9:48:10
2019-07-02 9:48:10 0 [Note] Plugin 'FEEDBACK' is disabled.
2019-07-02 9:48:10 0 [Note] Server socket created on IP: '::'.
我尝试以下方法：
如果有人有想法...
编辑：我尝试以管理员身份通过管理面板安装为 Windows 服务。所以，我的日志中有一些新行。似乎用户表已损坏...我该如何修复？
2019-07-02 10:04:41 0 [ERROR] mysqld.exe: Table '.\mysql\user' is marked as crashed and should be repaired
2019-07-02 10:04:41 0 [ERROR] mysqld.exe: Index for table '.\mysql\user' is corrupt; try to repair it
2019-07-02 10:04:41 0 [ERROR] Couldn't repair table: mysql.user
2019-07-02 10:04:41 0 [ERROR] Fatal error: Can't open and lock privilege tables: Index for table 'user' is corrupt; try to repair it
这个对我有帮助：
从控制面板打开 shell 并使用以下命令启动 mysql：
mysqld –-console –-skip-grant-tables –-skip-external-locking
从控制面板打开另一个 shell 并使用以下命令修复数据库：
mysqlcheck -r --databases mysql --use-frm
停止mysql，关闭shell并正常重新启动mysql。
我和你一样遇到这个问题。我已经解决了这个问题，如下所示。
Copy from xampp/mysql/backup folder and paste in xampp/mysql/data folder except ibdata1 file. 如果您从 xampp/mysql/data 替换 ibdata1 文件，那么某些数据库您将收到错误表不存在。
这个对我有帮助：
从控制面板打开 shell 并使用以下命令启动 mysql：
mysqld –-console –-skip-grant-tables –-skip-external-locking
从控制面板打开另一个 shell 并使用以下命令修复数据库：
mysqlcheck -r --数据库 mysql --use-frm