nuisance

I wish to rid my desktop of cookies like yieldmanager, fastclick, doubleclick etc. What good free software should I use, and also steps to be taken to prevent such nuisance. I am having Win XP(P) SP2 and MS Office 2003. How harmful are these cookies ?

Hi ! anybody help me...! I am sufferring from a nuisance when I open my removable device i found some folders such as network folder, data of administrator, and some default folders and file which can't be remove . instead it makes other duplicate . How to solve this problem ? anybody there kind...