MySQL 5.5 accepts password but then closes connection Apologies in advance for lack of information. I have installed MySQL 5.5 x64 on a Windows XP Professional x64 development machine. Today, upon trying to connect with any tool(MySQL workbench, PHP script, PhpMyAdmin, or command-line utility), the password is accepted but the connection is immediately closed:

C:\Program Files\MySQL\MySQL Server 5.6\bin&gt;mysql -u root -p
Enter password: ***************
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.6.5-m8 MySQL Community Server (GPL)

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owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql&gt; Bye

C:\Program Files\MySQL\MySQL Server 5.6\bin&gt;


I have attempted removing all MySQL server-related files by deleting the installation directory and C:\Documents and Settings\All Users\MySQL\MySQL server 5.6, as well as D:\InnoDB Datafiles, where my InnoDB Tablespace lies. There is no important data, but I am unable to get MySQL server to operate properly. If any more info is needed, please do tell.

I have installed MySQL with the MSI installer and the instance config wizard. I have also tried the 5.6 development version, to no avail.
A) Try with 


mysql -h[your IP] -u[username] -P[]port -p
mysql -h127.0.0.1 -u[username] -p
mysql -hlocalhost -u[username] -p


Which one works and which does not? 

B) Set Log_warnings=2 in my.ini and restart MySQL server and see error log entry when connection gets closed abruptly.