I have Camstudio up and running and it doesn't need any extra codecs installed for it to work with all my video players. Indeed IMHO adding 3rd party codecs often puts a spanner in the works especially codec packs. Often you get a codec in a pack that is a different version to what you already have installed thereby causing a conflict. I use video files in a multitude of formats from four different camcorders and I have never needed to install extra codecs.
yousaf, I note that you are the only admin on your PC but have you carried out my suggestion in post #6?
Your two attachments work fine, how did you get them uploaded if you haven't access to the files?