Do the Following it will help pc run fast.
Click start
click Run
type"msconfig" pop up box will appear
click start up
here is the tricky part.
unckeck most of the items that will be started on your start up.
this will reduce the time when your windows start.
remember to keep the basic items like clock, wireless, and so on.
do not remove anything that says System32 on the command column.
and for your msn problem.
msn is starting up when your computer boots.
so unclick on that say msnmessenger or something like that.

also whenever you install anything choose the option not to create shortcuts and icons.

hope it helps.
if need more send me an email
Texas Rocks.