As far as I know Real Player is a piece of software that contains spyware.
This is what is probably what is causing the anomalies you mention.
You would be best uninstalling it and following the above advice(run Adaware or another spyware remover.)
There is another version of real player called Real Alternative which will handle Real Player content but not put the dreaded spyware on your PC.
You could get it at:
http://fileforum.betanews.com/detail.php3?fid=1054136293
Its freeware and is a 5Mb download.
There's reviews of it on the page linked above too.
p.s.
if you're still getting probs post here and I'll try find an answer for you.