Note that many websites have their own advertising, unrelated to adware.
FreeScratchAndWin is an IE spyware Browser Helper Object dressed up as a web 'scratchcards' game. (What exactly is available to be won, and whether anybody has ever won it, remains unclear.)
It also highjacks your home- and search-page settings to point to xzoomy.com, and complains if you try to change them back.
Opens pop-up adverts every few minutes.
Downloads and installs arbitrary unsigned code as part of an update feature.
Addendum: FSW should not be confused with http://www.FSW.com which is a legitimate e-commerce development company.
Open the registry (Start, Run, regedit) and delete the following keys:
Reboot Windows and delete the 'FSW' folder inside 'Program Files'. Finally, go to Internet Options and reset your home page and search settings (Options->Programs->Reset Web Settings).