Trial versions usually do that, tell you everything you've got and how desperately you need to remove it.... but you can't unless you pay. Its irritating, so I tend to stick with the freebies or buy a decent piece of software that's worth buying.
Looking at your results, the Viewpoint Toolbar can be uninstalled following the instructions
here. It is interesting to see that it hasn't been flagged by Spybot S&D. This is mainly because throughout time, there has been some debate about whether or not Viewpoint is legitimate. Personally, I'd get rid.
The detection of CoolWWWSearch, CWS and ISTBar are false positives. They are not infections, they are entries in your registry that have been put in to limit access when you visit the website of those nasties and hopefully stop them installing. They have most likely been put in your registry by Spybot S&D, or if you have it installed, SpywareBlaster.
The remaining two detected items are cookies and can be deleted very easily by running a program like
CCleaner regularly to clear out your cookies. They are not really harmful. Alternatively, you can clear out your cookies form Internet Explorer, by going to
Tools > Delete Browsing History and clicking Delete Cookies and confirming in IE7.
Tools > Internet Options> Delete Cookies (under Temporary Internet Files) and then click Ok in IE6.
You should have been able to fix the items that were flagged up by Spybot.
It may be worth posting a Hijack This Log so that your system can be checked for anything else remaining that could be nasty. Please click the Read First Procedures link in my signature which gives you details on how to do this and what to do before hand.
