If you have trouble with the photo viewer application/device, you should first look on the seller's website to see if there is an update for WIndows 7. In case there is no resource for this process, contact the developer of the application/device and request a refund. If the purchase was within the timeframe allotted by the developer/manufacturer, then you are eligible for a refund. This is the only possible way. After this procedure, go to another website and buy something that has Windows 7 compatibility.