where do I go to find my Windows experience score
Open the start menu,right-click on Computer,select Properties. You will see your Index number there. If it is unrated, or less than 2 WB will not apply correctly. To rate it just click on the link next to the rating number and follow the instructions.
1 star seems to be helping, is there a way to make this apply to all my WB's at once
It's easier to rate all the blinds at 3 stars or better, which I believe is the default rating, then set the ratings filter for WB config to 1 or 0 (I prefer 0 myself.)