You can choose free online virus scanner or free virus removal tool here.
Anyway, the best way to remove virus is the rescue cd (rescue usb) .
There are several always top rated antivirus and PC security products. Also there are some independent no rated high quality free antimalware products, which also must be considered.
When choosing antivirus first of all one should avoid rogue software ( fake antivirus).
Not to be faked, watch Microsoft sertified products.
look up independent *antivirus tests
Proactive Security Challenge 2010-2011
Products' ratings
Products tested against the suite with 148 tests
1 Comodo Internet Security 4.0.141842.828FREE100 %10+Excellent - 100 %
2 PC Tools Internet Security 2011 8.0.0.62399 %10+Excellent
3 Online Solutions Security Suite 1.5.14905.099 %10+ExcellentN/A
4 Outpost Security Suite Free 7.0.4.3418.520.1245.401FREE97 %10+Excellent
5 Outpost Security Suite Pro 7.0.1.3376.514.1234.40197 %10+ExcellentN/A
6 Kaspersky Internet Security 2011 11.0.1.40092 %10+Excellent
7 Malware Defender 2.6.090 %10Very goodN/A
8 Privatefirewall 7.0.21.1FREE86 %9Very goodN/A
9 BitDefender Internet Security 2011 14.0.24.33084 %10+Very good
ZoneAlarm Extreme Security 9.1.008.00059 %7PoorNot recommended
Rising Internet Security 2010 22.33.00.0155 %8PoorNot recommended
Norton Internet Security 2011 18.1.0.3740 %6Very poorNot recommended
Jetico Personal Firewall 2.1.0.7.241228 %4NoneNot recommended
Dr.Web Security Space Pro 6.0.2.0729014 %3NoneNot recommended
CA Internet Security Suite Plus 2010 6.0.0.28512 %3NoneNot recommended
F-Secure Internet Security 2010 10.00.2469 %2NoneNot recommended
Trend Micro Internet Security Pro 2010 17.50.1647.00009 %2NoneNot recommended
FortKnox Personal Firewall 6.0.205.07 %2NoneNot recommended
ZoneAlarm Free Firewall 9.2.076.000FREE7 %2NoneNot recommended
-ESET Smart Security 4.2.64.126 %2NoneNot recommended
avast! Internet Security 5.0.418.03 %1NoneNot recommended
Avira Premium Security Suite 10.0.0.5423 %1NoneNot recommended
AVG Internet Security 2011 10.0.11533 %1None
McAfee Internet Security 2010 11.0.3783 %1NoneNot recommended
G Data InternetSecurity 2011 21.1.1.02 %1NoneNot recommended
Panda Internet Security 2010 15.01.002 %1None
TrustPort Internet Security 2011 11.0.0.45842 %1NoneNot recommended
Editor"s comment. Although, Proactive Security Challenge has been trusted by reliable vendors, f.e. Kaspersky, some results are under question.
The results about comodo and kaspersky look like truth.
source: matousec.com
You can choose free online virus scanner or free virus removal tool here.
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AV-Test | 2011 2nd quarter | Windows XP
AV-TEST Product Review and Certification Report - 2011/Q2
av-test
During the 2nd quarter of 2011 AV-TEST have tested 22 security products in the areas protection, repair and usability. The "Protection" covers static and dynamic malware detection, including real-world 0-Day attack testing. In case of "Repair", AV-TEST check the system disinfection and rootkit removal in detail. The "Usability" testing includes the system slow-down caused by the tools and the number of false positives. A product has to reach at least 11 out of 18 possible points in order to receive a certification. 16 products have fulfilled our requirements and received an AV-TEST certificate. The test reports can be found here:
source: av-test | anti-virus test
Check prices at Bitdefender.com
Bitdefender Antivirus Plus 2012
Bitdefender Internet Security 2012
Bitdefender Total Security 2012.
2013 coming soon…
Dec 28 2010
Malware Research Group started conducting quick tests in Q3 of this year, using single zero day / early life malware samples. Of course individual tests were not presented as efficacy assessments of the security applications being tested, but would serve to give some representation of performance when looked at over time. An overall number of 22 security programs has been tested this way.
The tests were based on a Windows 7 32 Ultimate virtual machine with all updates, of course every single application got its own VM. Samples came directly from MRG honeypots and were then uploaded to a certain URL so that it could be downloaded to the VM by using Internet Explorer.
The final results:top5
Emisoft Antymalware v5
Defence Wall v3
Zemana Antilogger 1.9
Hitman Pro 3.5
Prevx 3.0

Read more...
Copyright 2010 Malware Research Group / Zorin Nexus Ltd.
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september 2010
AV-Test
windows xp
repair
1.PC Tools: Internet Security 2010/2011 | 2.Symantec: Norton Internet Security 2010/2011 | 3.F-Secure: Internet Security 2010/2011
usability
1.Avast: Internet Security 5.0
2.G Data: Internet Security 2011
3-6.BitDefender: Internet Security Suite 2010/2011
F-Secure: Internet Security 2010/2011
Microsoft: Security Essentials 1.0
Symantec: Norton Internet Security 2010/2011
Copyright 2011 www.av-test.org
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AV-Comparatives.org may 2010 (both find and disinfect)
winners
TrustPort
Bitdefender
Kaspersky
Avira
eScan
Microsoft
Eset Nod32
F-Secure
G Data
source: AV-Comparatives.org
anti-malware.ru february 2010 (both find and disinfect )
winners
Dr.Web Anti-Virus 5.0 81%
Kaspersky Anti-Virus 2010 81%
Avast! Professional Edition 4.8 63%
Microsoft Security Essentials 1.0 63%
Norton AntiVirus 2010 56%
F-Secure Anti-Virus 2010 44%
failed
Panda Antivirus 2010 (38%)
AVG Anti-Virus & Anti-Spyware 9.0 (31%)
Avira AntiVir PE Premium 9.0 (31%)
Sophos Anti-Virus 9.0 (31%)
Trend Micro Antivirus plus Antispyware 2010 (31%)
BitDefender Antivirus 2010 (25%)
Eset NOD32 Antivirus 4.0 (25%)
McAfee VirusScan Plus 2010 (19%)
Comodo Antivirus 3.13 (13%)
Outpost Antivirus Pro 2009 (13%)
VBA32 Antivirus 3.12 (6%)
source: anti-malware.ru
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*some tests could be paid for. some tests do not include some vendors. choose yourself.