本机上的mysql无法启动

[lovejavalovechina]

我机器上有两个mysql不知什么时候起，都启动不了了，但是把数据库从copy到别人机器上却能正常启动，数据也能正常读出来。请问为什么呢？附日志：
Edition (GPL)
101019 10:46:01 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
101019 10:46:01 InnoDB: Starting log scan based on checkpoint at
InnoDB: log sequence number 0 533653.
InnoDB: Doing recovery: scanned up to log sequence number 0 533653
101019 10:46:02 InnoDB: Started; log sequence number 0 533653
101019 10:46:03 [Note] E:\messageboard\MySQL Server 5.0\bin\mysqld-nt.exe: ready for connections.
Version: '5.0.22-community-nt' socket: '' port: 3306 MySQL Community Edition (GPL)
101020 14:41:02 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
101020 14:41:02 InnoDB: Starting log scan based on checkpoint at
InnoDB: log sequence number 0 534835.
InnoDB: Doing recovery: scanned up to log sequence number 0 534835
101020 14:41:02 InnoDB: Started; log sequence number 0 534835
101020 14:41:03 [Note] D:\messageboard\MySQL\MySQL Server 5.0\bin\mysqld-nt.exe: ready for connections.
Version: '5.0.22-community-nt' socket: '' port: 3306 MySQL Community Edition (GPL)