Well, #1 and #2... no offense, but
JESUS CHRIST READ HERE.
Sorry, it slipped out. You have spyware. Read that thread to find out how to get rid of it.
#3, the right clicking thing, I got that a while ago in an old Win98 install. I never figured out exactly what the problem was, but I fixed it by just right clicking once. After I right clicked once, I could left click normally again.
#4... I can't tell you what that is offhand. Did you update WMP lately? It's possible that a new version just crashes you, in which case the only recourse is to roll it back to an older version. It also could be a virus or spyware. After you read that other thread, let us know if you still have the problem.
Sorry, I just get a little tired of reading this every couple of days. The stickies are there for a reason. Because people ask the same question over and over and over and over and over and over and over and over... you get the point.