Adaware
With its ability to comprehensively scan your memory, registry, hard, removable and optical drives for known datamining, aggressive advertising, and tracking components, Ad-aware will provide the user with the confidence to surf the Internet knowing that their privacy will remain intact. Let Ad-aware protect your privacy.

Irfanview
IrfanView is a very fast, small, compact and innovative FREEWARE (for non-commercial use) graphic viewer for Windows 9x/ME/NT/2000/XP. Absolutely a must have. View, crop, rotate, and many more very useful graphics operations.

Google Toolbar
Search the web with Google from any site, Eliminate pop-up ads, Fill in forms with one click, Highlight search terms on a page. Highly Recommended even if you just use it to block popups.

SpyBot Search & Destroy
Spybot - Search & Destroy can detect and remove a multitude of adware files and modules from your computer, plus many more features. Highly Recommended!