After downloading the windows 7 ISO from the link given below, you can latter on convert it to bootable DVD or USB in order to install fresh copy of windows 7 into your PC, laptop and MacBook. . It is totally up to you whether to go for windows 7 professional version, home premium or ultimate.
Microsoft Windows 7 ultimate is highly recognized as the best operating system for business community and professionals. That's why many professional and industrialist prefer it on other operating systems. Windows 7 ultimate also gives you opportunity to work in any of 35 languages.
Premium and latest version of Windows 7 ultimate gives you optimum features while professional version best fit for your business and industry related tasks. Even after the release of windows 8 and windows 10 respectively windows 7 is yet the most popular operating system between business personnel.
Basic Requirements for Windows 7 Ultimate:-
Processor: 1 GHz or faster processor
Memory/RAM: 1 GB or more
HDD Space: 15 GB Hard disk space required
Graphics: DirectX 9 graphics processor, with screen resolution of Videos 1366x768