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.

If you don't have a license and want a free or low-cost alternative, consider these options:

Intel® Pentium® 4 or AMD Athlon® 64 processor. Memory: 1GB of RAM. Storage: 1GB of available hard-disk space for installation. How to Install if You Have a License

If you previously purchased the software, you can still install it using your original media or by contacting Adobe Support for a direct download link.

Adobe originally offered a 7-day free trial for CS6, but they have since moved to a subscription-based model via Creative Cloud.

Use your original DVD or a verified direct link from ProDesignTools , which provides archived Adobe files.

You can usually find this in your Adobe Account under "My Products".