右下角安全中心弹出的消息

http://www.microsoft.com/windows/antivirus-partners/windows-7.aspx

这是连接，上面有两个杀毒软件的连接

AVG和卡巴

for windows7版的　

http://www.kaspersky.com/windows7

http://www.avg.com/special-download-antivirus-for-windows-7-mssc

卡巴2009免费用三个月

Windows 7 security software providersWe recommend that you install security software to help protect your computer from viruses and other security threats, and that you keep your security software up to date.
The companies listed below provide security software that is compatible with Windows 7. Just click the company name to see the Windows 7-compatible product they offer.
Important: Before you install antivirus software, check to make sure you don't already have an antivirus product on your computer. If you do, be sure to remove the product you don't want before you install the new one. It can cause problems on your computer to have two different antivirus products installed at the same time.

Microsoft is actively working with additional security software independent software vendors (ISVs) so that security software solutions will be available for Windows 7 Beta and Windows 7 RTM.

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