Note that many websites have their own advertising, unrelated to adware.
ISTbar is an IE toolbar, homepage- and search-hijacker provided by Integrated Search Technologies/CDT Inc.
ISTbar/AUpdate installs a TinyBar variant to implement its toolbar, and will be detected by the script at this site as TinyBar/B. The hijacker is aimed at my-internet.info and blazefind.com; distribution is managed by searchbarcash.com, its controlling server.
ISTbar/XXXToolbar is an update based around porn. It uses its own toolbar code. The hijacker is aimed at its controlling server xxxtoolbar.com, and slotch.com; distribution is controlled by toolbarcash.com.
ISTbar alse installs other parasites: both variants install porn pop-up producer RapidBlaster/lp; the AUpdate variant is also known to install DownloadPlus.
There is a entry in Add/Remove Programs for 'MS AUpdate' (AUpdate variant) or 'ISTbar' (ISTbar variant). Unfortunately this doesn't remove the toolbar in the AUpdate variant, or RapidBlaster in either variant.