Uninstall McAfee Security system to Install AVG's security information.

I need to uninstall McAfee Security software so that I may download AVG's free security software.  I can''t install AVG's until I disconnect McAfee.  I tried this several weeks ago and couldn't figure out how to do it.

First go through the normal way, ie. Control Panel > Programs and Features, or Add and Remove > uninstall.
Then, use  McAfee Removal Tool to ensure no remnants of McAfee shall remain in the system :
Source : http://www.pchell.com/virus/uninstallmcafee.shtml

Excerpt ......
Follow these directions to download the McAfee Removal Tool and run it to remove the above programs.

1. Click on the following link to download the MCPR removal tool
   
   http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe</small>
2. Click Save and save the file to your desktop</small>
3. Close all McAfee Application windows you may have open, and double-click on MCPR.exe to start the removal tool. Windows Vista users will have to right-click on the file and select "Run as Administrator"
4. After the removal tool finishes, you should be prompted to restart your computer. </small>
5. Once the computer restarts, your McAfee product should be uninstalled.</small>
6. If for any reason there appears a red X during the uninstall, go to the following location for more advanced uninstall instructions involving the registry.
   
   http://tools.mcafeehelp.com/doc.php?siteid=1&docid=419397
   </small>