I added something else on my post above.
Well, basically I was having headaches too...for years
so I'm talking from experience.
Oh, and M$ don't include uninstallers for their programs anymore so if you don't like one - I hated wmp 9 for example - they advice you to use system restore to go back.
The only other solution is to format your root partition and start again
Basically, you don't need any more system programs than the ones M$ provides you with. Those programs will probably create more problems than solve problems