these r most probably adwares., which get installed with some applications u install without reading the license agreement. always read the license agreement, it tells u what all programs u r going to install.
Install Ad-Aware or Spybot S&D 1.3 ( find them on digit dvd/cd). run them , they will fix the problem.
Before this if u want to stop them from loading at startup, Goto RUN, type msconfig , in the startup tab uncheck the entries pertaining to these adwares.
here are some links to manually delete them through registry:
http://www.cco.caltech.edu/~alex/pub/CashBack.htm
http://www.iamnotageek.com/a/ezstub.exe.php
Hope this solves ur problem.
And yes one more thing, since this is a software related topic so u shud hav posted in the software section.
Shocked after uninstalling games
on my machine which appear in my system tray every time i connect to internet and my connection speed has decreased to a great extent. The software that appear in the sys tray is 'cashback', another one is 'ezstub' which runs automaticaly when windows starts 
. pls help me remove these useless softwares. What's your answer dear digit? 
Linear Mode
