Boa noite, Alamino,
Fiquei em dúvidas sobre o que baixar.
Mas, ao acessar esta página, surgiu um monte de opções, que são:
Windows (x86, 32-bit), ZIP Archive 5.1.43 25.5M Download
(mysql-5.1.43.zip) MD5: 2aedd2d80e5cc755134f4be85e5d1505
Windows (x86, 32-bit), MSI Installer 5.1.43 39.0M Download
(mysql-essential-5.1.43-win32.msi) MD5: 9d5fb5144de1d89780531ccad7d8dbc2
Windows (x86, 32-bit), MSI Installer 5.1.43 104.9M Download
(mysql-5.1.43-win32.msi) MD5: 1774e59012916cf835749741e396d1f7
Windows (x86, 64-bit), MSI Installer 5.1.43 31.7M Download
(mysql-essential-5.1.43-winx64.msi) MD5: 4625c3449dae045831989295361ec5af
Windows (x86, 32-bit), ZIP Archive 5.1.43 113.4M Download
(mysql-noinstall-5.1.43-win32.zip) MD5: c830f4e86c3f553dea84d024b783fb99
Windows (x86, 64-bit), ZIP Archive 5.1.43 116.6M Download
(mysql-noinstall-5.1.43-winx64.zip) MD5: 84bc861769ce6165ac9f645beaf2a9c3
Windows (x86, 64-bit), MSI Installer 5.1.43 97.8M Download
(mysql-5.1.43-winx64.msi)