Do it yourself

Two questions to pose for the group: 1) We installed an ash floor several years ago and had a Swedish finish applied. Wanting to protect it from wear in a bright nook of the kitchen we laid down an area rug. I now find the floor has yellowed all around the rug... but not under the rug, so there is a very prominant outline of the rug on the floor. Does anyone have any idea what we can do to correct it? Will exposure to the air and sun yellow that spot enough to eventually even out the color or do we need to sand it all out? 2) We've also found some problems with several windows. They are white aluminum, 6 feet high, opening at the bottom (sliding up). One of the windows doesn't seal down tightly when we close it, sort of pops back up a tiny bit. On another, the locking pin isn't working. A third window sticks a bit upon opening. Any ideas how to correct these things without having to go to the expense of changing the windows? They are about 10 years old, btw. Appreciate any help. karen