FLV to WMV converter—convert FLV to WMV (windows media video) easily and quickly

Here is the thing, i downloaded an ornate and rocking game video from YouTube few days ago, i really like it. But its picture is very rough, cause its format is FLV. So I plan to convert FLV to WMV for better watching effect, although I've never done this job before and I even don't know any FLV to WMV converter. But I'm not one who gives up easily, I spend almost 7 hours and set it up finally. For those who met the same question, I decide to sharing the method how to convert FLV to WMV on the net today.