A headache for MySQL

Recently, mysql5.1 was used as a database to develop a small Desktop Management System for customers. The installation package downloaded from the official website is found to be: Because the software is to be delivered to the customer's own installation, the customer found that some machines will fail 1045 when applying secuity settings. See. As a result, the uninstallation and reinstallation are the same.   Therefore, the customer started Multiple tests and found problems. If the customer successfully or fails the installation for the first time, uninstall MySQL and delete the entire directory. Then re-install the service. There is a very high probability that the application secuity settings fails 1045 in Step 4 when the service is started. Once this error occurs, there is basically no solution ....   OS: XP SP3 Ver: 5.1.32 All the information is displayed as username or password errors, but it should not. I used a very simple password "123", so it was very depressing. The user was asked to delete the directory every time during the reinstallation, and my. ini was definitely deleted. But the problem persists. Ah ......