If your computer is running Windows 8, you already have antivirus software. Windows 8 includes Windows Defender, which helps protect you from viruses, spyware, and other malicious software.
If Windows Defender is turned off and you don’t have another antivirus program installed (or your other antivirus program is not working), you will see a warning in the notification area on your taskbar.
Windows 7 includes spyware protection, but to protect against viruses you can download Microsoft Security Essentials for free.
To find out if you already have antivirus software:
If Windows can detect your antivirus software, it's listed under Virus protection.
Windows doesn't detect all antivirus software, and some antivirus software doesn't report its status to Windows. If your antivirus software isn't displayed in Action Center and you're not sure how to find it, try any of the following:
Windows Vista does not include virus protection. To protect against viruses, you can download Microsoft Security Essentials for free.
The status of your antivirus software is typically displayed in Windows Security Center.
If Windows can detect your antivirus software, it will be listed under Virus protection.
Windows does not detect all antivirus software, and some antivirus software doesn't report its status to Windows. If your antivirus software is not displayed in Windows Security Center and you're not sure how to find it, try any of the following:
Click the security icon on the taskbar, or click Start, select Control Panel, and then double-click Security Center.
On April 8, 2014, Microsoft will end support for Windows XP. This means that after April 8, there will be no new security updates available through automatic updating for computers that are still running Windows XP.
Also on this date, Microsoft will stop providing Microsoft Security Essentials for download on Windows XP. (If you already have Microsoft Security Essentials installed, you will continue to receive antimalware signature updates for a limited time, but this does not mean that your PC will be secure because Microsoft will no longer provide security updates to protect it.)
For more information, see Support is ending soon.
Get more information about upgrading to Windows 7 and Windows 8.
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MS Exchange Server 2007, MS Office 2007 and some other programs will be installed on one of my older systems ( Laptop and other systems / Network Engineering status for company requirements ).
I was very confused on how could i find right antivirus software but having gone through your article , I got an inshit. Now, I am able to find out right antivirus software according to my choice.
A few days ago I bought a Dell Inspiron 15 which has Windows 8 from Best Buy. They gave me a DVD to install Trend Micro antivirus so I installed it.
Now, however, after reading your article I would like to remove the Trend Micro and just run Windows Defender. How do I make sure Windows Defender is on before I remove Trend Micro?
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How can i get antivirus while my laptop doesn't open any files and i don't have any window?
When i open my laptop i don't find casser and after i mints its tell me to Restore.
Then i tried to open hangouts call is also need to install plugin, when i click install plugin is not working so i need help for this please, i use chrome laptop.
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Anti-virus is Dead.Don't be in belief that my Anti-Virus is best,because hackers can get in even with an installed Anti-virus program