The role of a Spyware Blocker is to protect your computer against incoming threats. These threats can be from from security holes in your browser, files you download and execute, and from the possibility of others physically putting monitoring software on your computer such as keyloggers.

Any good spyware blocker program should immediately scan and notice whether or not a file is corrupted before it’s executed on your computer. Likewise it should stop any programs from being downloaded onto your computer that may be malicious.