Fix error

Because Windows 7 is a new operating system for our computers, is possible to have compatibility problem for our antivirus. Some of us have installed an older version of antivirus and these can have problem. To solve the problem we should keep in focus which version of our antivirus are compatible with Windows 7.

To make our job easily, Microsoft have a list with antivirus which are compatibles with Windows 7 and you can find this list here(http://www.microsoft.com/windows/antivirus-partners/windows-7.aspx).
To have an antivirus on your computer is recommended and for your protection is good to have one.
Before you install on your computer a new antivirus is recommended to look in Control Panel to see if you have one installed, in case of you have one installed is more safety to remove this and after you finish this, you can install the new one.