'Delta Search' is a program that offers a web search engine and toolbar which are being promoted via other free programs, and once installed on your computer, they will hijack your browser homepage and replace your default search engine.

There are websites which have suggested downloading of programs  to eliminate or prevent 'Delta Search'. I can't assure you of how good these programs are but I can tell you how dangerous it is to load unfamiliar programs onto the computer. 

Below is recommended tips of how to remove 'Delta Search' from your computer manually. I followed these instructions after mistakenly downloading a program and it worked on windows 7, but you can try on other windows.

First of all uninstall the installed program which came along with 'Delta Search' from the programs at the control panel. After uninstalling if the problem still exists, it means there are hidden traces of the program somewhere. Follow the instructions below to get rid of it completely.
Click toolbar at the top right corner of the computer (Toolbar sign is a small spanner)
A box opens with toolbar options
Under Search Features will you see
Use Google site: Choose preferred language browser by country
After that follows five boxes
  1.       Suggest searches as you typed
  2.       Store search history on my computer
  3.       Use Google as my homepage
  4.       Set and keep Google as the default search engine
  5.       Show a notification if this setting changes
  6.       Show highlighted text in the search box

Make sure that all the small boxes are ticked. Finally, save it to effect the changes. The Delta search quickly disappears and Google homepage takes its place. If there is any other way I can help you, please be free to contact me. E-mail: