Answers:
In increment to a firewall you must hold full time (active) virus protection and full time spyware protection.
All the following programs are free.
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Full Time (Active) Virus Protection
If you do not enjoy influential virus protection, install just one.
AVG Antivirus 7.5 Free Edition
http://free.grisoft.com/freeweb.php/doc/...
http://www.download.com/avg-anti-virus-f...
or
Free antivirus - avast! 4 Home Edition
http://www.avast.com/eng/avast_4_home.ht...
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Full Time (Active) Spyware Protection
Windows Defender
http://www.microsoft.com/athome/security...
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Install the following four programs and run weekly. You have need of adjectives four. They will greatly increase your protection. They are not a substitute for full time spyware and virus protection.
Ad-Aware SE Personal (update + full scan)
http://www.lavasoftusa.com/products/ad-a...
Spybot Search & Destroy (update + give a vaccination to + scan)
Do not see Tea Timer and SDHelper
After installation: update + scan + immunize
http://www.safer-networking.org/en/mirro...
SpywareBlaster: Update afterwards uncap and click “enable adjectives protection”.
http://www.javacoolsoftware.com/spywareb...
SUPERAntiSpyware free publication: (update + scan)
http://www.superantispyware.com/...
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Install The following:
CCleaner: Do not install toolbar option
Removes tracking cookies, unneeded files, history
In option.
Set to run when computer starts.
Place cookies you want to hold surrounded by collect list
http://www.ccleaner.com/
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Install any one not both:
McAfee Site Advisor: Internet Explorer and Firefox
http://www.siteadvisor.com/
McAfee SiteAdvisor help protect you from adjectives kind of Web-based deposit threats including spyware, adware, spam, virus, browser exploits, and online scam.
TrendProtectTM
http://www.trendsecure.com/portal/en-us/...
TrendProtect is a FREE browser plug-in that help you avoid Web page beside unwanted content and unnoticed threats.
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Rootkits Removers
Pick any 2 install and run one respectively month.
AVG Anti-Rootkit
http://www.grisoft.com/doc/products-avg-...
F-Secure BlackLight
http://www.f-secure.com/blacklight/...
Panda Anti-Rootkit
http://www.pandasoftware.com/products/an...
Sophos Anti-Rootkit
http://www.sophos.com/products/free-tool...
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Online Free Scanners:
Run Trend Micro, Kaspersky, and Panda Scan in a minute.
Run a different one respectively month.
BitDefender Online Scanner
http://www.bitdefender.com/scan8/ie.html...
CA eTrust(R) PestScan
http://pestpatrol.com/pestscan/index.htm...
eTrust Antivirus Web Scanner
http://www3.ca.com/securityadvisor/virus...
F-Secure Online Virus Scanner
http://support.f-secure.com/enu/home/ols...
Kaspersky - Free Online Virus Scan
http://www.kaspersky.com/virusscanner...
McAfee - Free Scan
http://us.mcafee.com/root/mfs
Panda Software - ActiveScan
http://www.pandasoftware.com/activescan/...
Symantec (norton) - Security Check
http://security.symantec.com/sscv6/defau...
Trend MicroTM HouseCall
http://www.trendmicro.com/hc_intro/defau...
If your looking for free anti virus, be in motion to www.pctools.com
Try
http://tipsfromruby-internetsecurity.blo... for further support to maintain your computer protected next to regular virus protection and other related updates and communication .