Here is the list of dangerous things a spyware or ad-ware can do
These studies also showed that one in three PCs is infected with the malicious types of spyware, such as system monitors and Trojan horses. This spyware is dangerous because it can compromise our efforts to guard privacy and online security by sending any information from our computers to a third party.
Wireless networks have become very popular in today’s market with the continuing increase in technology. A major concern with wireless networks is in fact the security of this feature. Securing wireless networks has become more and more important with the increase in the number of users of wireless networks. It is now simple for the average individual to set up a wireless system at home or at the office. These systems may be within the range of many other potential network intruders with the technology to detect and access the systems.
Simply put it acts as a barrier between your computer and the internet. To protect you from crackers, hackers and malware.
If your running DSL or a cable modem you should employ a firewall, as having a direct connection to the Internet can make you a target to attack.
