[RX7]

Hi there,
My computer is fully equiped with the most recent security software. I have MS Antispyware, AVG antivirus, ZoneAlarm firewall and a bunch of specialized security and privacy tools. But I remember the day when I got a virus that deleted important antivirus files and killed all running security programs. Now I'm just fear of similar situation and therefore want to write down links of good online virus scanners, just to be sure that I won't lose my system and information. The service must be absolutely free-to-use.

[Silas]

Try this one from Panda Software. This is virus scanner only , will find but will not remove (never did for me) any virus or spyware.
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Security software downloads

[TerryT]

Try TrendMicro house call.It scans for viruses,spyware etc. by checking the whole system.Absolutely free
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Prevention is always better than cure