You don't tell your browser, but both IE and Firefox (I don't know about Chrome) have their 'Manage add-ons' to get rid (disable) most of such software. Did you try?
Installing and using another browser might help also. And so could using this same browser in a new Windows account (browser add-ons are Windows account dependent).
A certain "search.sweetim.com" software has sneakily entered my computer, which appears whenever I make any Internet search.
I am not able to locate that program anywhere in my computer so that I can expunge it from my computer.
I shall appreciate help in expunging it.
Thank you very much.