Use your original DVD or a verified direct link from ProDesignTools , which provides archived Adobe files.
If you don't have a license and want a free or low-cost alternative, consider these options: photoshop-download-cs6-free-windows-7-hot
If you already own a legitimate license or serial number, Photoshop CS6 is fully compatible with Windows 7 (32-bit and 64-bit). Windows 7 Service Pack 1. Use your original DVD or a verified direct