In addition to a firewall you must have 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 have active virus protection, install only one. All are excellent.
Try AVG first.
AVG Antivirus 7.5 Free Editionhttp://free.grisoft.com/freeweb.php/doc/…http://www.download.com/AVG-Anti-Virus-F…
or
Free antivirus – avast! 4 Home Editionhttp://www.avast.com/eng/avast_4_home.ht…
or
AOL Active Virus Shield (powered by Kaspersky)http://www.activevirusshield.com/antivir…
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Full Time (Active) Spyware Protection
Windows Defender http://www.microsoft.com/athome/security…
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Install the following five programs and run weekly or at least monthly. You need all five. 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 + immunize + scan)
Do not enable Tea Timer and SDHelper
After installation: update + scan + immunizehttp://www.safer-networking.org/en/mirro…
SpywareBlaster: Update then open and click “enable all protection”. http://www.javacoolsoftware.com/spywareb…
SUPERAntiSpyware free version: (update + scan)http://www.superantispyware.com/
CCleaner: Do not install toolbar option
Removes tracking cookies, unneeded files, history
In options.
Set to run when computer starts.
Place cookies you want to keep in save listhttp://www.ccleaner.com/
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Free Online scanners
Microsoft OneCare Live, run “full service scan”
Updates windows, virus and spyware scan, disk cleanup, disk fragmentation (if needed), backs up registry and then cleans registry, and checks for open firewall portshttp://onecare.live.com/site/en-us/defau…
Malicious Software Removal Tool (run “full scan”)http://www.microsoft.com/security/malwar…
Trend Micro: HouseCall Free Scan (removes what it finds)http://housecall.trendmicro.com/
BitDefender Online Scanner http://www.bitdefender.com/scan8/ie.html
Kaspersky Labs Online Scanner http://www.kaspersky.com/virusscanner
McAfee http://us.mcafee.com/root/mfs/default.as…
Panda ActiveScan Free Online Scanner http://www.pandasoftware.com/products/ac…
Symantic Online Scanner http://security.symantec.com/sscv6/ssc_e…
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Free rootkit removal tools
Rootkits Removers
Pick any 2 install and run one each month
AVG Anti-Rootkithttp://www.grisoft.com/doc/products-avg-…
F-Secure BlackLighthttp://www.f-secure.com/blacklight/
Trend Micro Rootkit Busterhttp://www.trendmicro.com/download/rbust…
Sophos Anti-Rootkit http://www.sophos.com/products/free-tool…
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