You don't have to be a photographer to do it yourself, I showed my 10 year old granddaughter (she was angry that I had called her 9 year old) how to improve her photos and it is just second place to her even without using photoshop. I don't use windows so I can't help anyone much.
The first thing I would do is set the crop to the final size you want ie 800 x ??? this will take out extraneous colour bias if there is any. Then I would set the colour temperature, if your camera can accept a custom colour balance then set it accordingly, even though I use flash I set mine to 7045K. Just because everyone will tell you to use 5000k -5500k doesn't men you have to do it, much like the concavia. What you are trying to achieve is something that is like the product you are photographing. If it doesn't look right set it differently. You didn't follow all the rules about turning so why would you follow it about photos. There's lots more, but I have had too much wine.
Peter
