I have some free items here that work great.
Items that are essential when using the net are:
A good Firewall
A Virus Scan with updates
Spyware
Anti spam
Some great free items which I personally use are
Sygate firewall V5,
http://www.sygate.ca/
Overview
SyGate Personal Firewall operates as a security agent to enforce rule-based security policy on host devices, whether remote or behind a corporate firewall. As a host-based system, SyGate Firewall enables security policies to be set on a host device according to any combination of:
Application allowing each application access privileges to only certain required IP addresses, ports or protocols
Trusted IP Addresses allowing access privileges to specific IP addresses
Ports - allowing access privileges to specific ports
Protocols - allowing access privileges to specific protocols
Schedule allowing automatic implementation of different security policies at different times
This host-based profiling gives SyGate Firewall the ability to not only detect, identify and block known Trojans and Denial of Service attacks, but also protect against new or unknown attacks by blocking applications and traffic that violate a defined profiles security rules. Port scans are also detected and logged to alert users of potential attacks, while maintaining system security.
AntiVirฎ
Personal Edition
antiv guard v.6
http://www.free-av.com/
The private and individual use of the AntiVir Personal Edition is completely free of charge!
Even though viruses have now grown very numerous, one thing hasn't changed: our commitment to provide you with all-round protection. The reliability of AntiVir is demonstrated in numerous comparison test and references featured in independent trade journals.
The AntiVir Personal Edition offers the effective protection against computer viruses for the individual and private use on a single PC-workstation. In order to make possible an easy operation, the AntiVir Personal Edition is developed to the essential points.
You'll be amazed how thoroughly AntiVir protects:
detects and removes more than 70,000 viruses
always among the winners of comparison test featured in computer journals
the resident Virus Guard serves to monitor file movements automatically,
e.g. downloading of data from the internet
scanning and repair of macro viruses
Protection against previously unknown macro viruses
easy operation
Internet-Update Wizard for easy updating
Protection against previously unknown boot record viruses and master boot record viruses
Quality "Made in Germany"
support is free of charge via AntiVir Bulletin Board
and lastly Ad-aware from Lavasoft
http://www.lavasoftusa.com
What is Ad-aware?
Ad-aware is THE award winning, multi-trackware detection and removal utility (designed for Windows 98 / 98SE / ME / NT40 / 2000 / XP Home / XP Pro) that will comprehensively scan your memory, registry, hard, removable and optical drives for known Datamining, aggressive advertising, Parasites, Scumware, Keyloggers, selected traditional Trojans, Dialers, Malware, Browser hijackers, and tracking components.
Ad-aware will provide you with the confidence to surf the Internet knowing that your privacy will remain intact.
Lastly the Spam problem This site below has some great advise to stop spam.
The Anti-Spam Home Page
http://www.arachnoid.com/lutusp/antispam.html