For MySQL 5.1 on Windows, the default installation
      directory is C:\Program Files\MySQL\MySQL Server
      5.1. Some Windows users prefer to install
      in C:\mysql, the directory that formerly was
      used as the default. However, the layout of the subdirectories
      remains the same.
    
For MySQL 5.1.23 and earlier, all of the files are located within this parent directory, using the following structure:
Table 1.1. Installation Layout for Windows using MySQL 5.1.23 and earlier
| Directory | Contents of Directory | 
|---|---|
| bin | Client programs and the mysqld server | 
| data | Log files, databases | 
| Docs | Manual in CHM format | 
| examples | Example programs and scripts | 
| include | Include (header) files | 
| lib | Libraries | 
| scripts | Utility scripts | 
| share | Error message files | 
For MySQL 5.1.24 and later, the default location of data directory was changed. The remainder of the directory structure remains the same:
Table 1.2. Installation Layout for Windows using MySQL 5.1.24 and later
| Directory | Contents of Directory | 
|---|---|
| bin | Client programs and the mysqld server | 
| C:\Documents and Settings\All Users\Application
              Data\MySQL | Log files, databases | 
| Docs | Manual in CHM format | 
| examples | Example programs and scripts | 
| include | Include (header) files | 
| lib | Libraries | 
| scripts | Utility scripts | 
| share | Error message files | 

