QuickTime/itunes - How to Uninstall?

Hi, I had this problem since qiuet a long time... try to reinstall the new quicktime/itunes software again but giving me this problem... i tried to uninstall the whole quicktime but cannot uninstall totally... can anyone tell me what can be done? thanks~!

 

What happens exactly when you try to uninstall it via Add/Remove or the Start Menu?

 

tried both... but currently there's seem no quicktime install as quicktime logo was not found in the startup menu...
below this 2 screenshot of the problem encounter during installing...

 

You try reinstalling then uninstalling?

 

uninstall first then follow by install... what a headache for me... I cant use my new ipod because of this...