ArovaxShield

Product: ArovaxShield 2.1.103
Company: Arovax Company
Website: http://www.arovaxshield.com/
Type: Free
Requirements: Windows XP, Vista

Arovax Shield is a real-time protection program that can guard your computer from common threats like spyware, adware and other malware that attempt to make changes to your system. 

It monitors the auto-start entries, browser extensions and HOSTS file, and alerts you if any changes are being made to them. In addition, it can block IE hijacks, as well as tracking cookies. The program does not scan for or identify any adware or spyware, however it alerts you of changes that may indicate such a malicious program. You can also choose to block selected changes automatically.