Please follow the steps below and retry the installation;
Open Internet explorer - Click on Tools - Then Click windows update - Install the important Updates from Windows (If any)
Click on start - Click Run - type - appwiz.cpl , (now you will be in the installed programs list). Make sure that you are not running any other security software in the computer that might interrupt the installation. Make use of this document to find out different security applications.
Run the McAfee removal tool from here and restart the computer. - This will help us remove McAfee traces from the machine
After its restarted, run the Mcprenstall tool from here and retry installation
To resolve the issue, I formatted the Notebook with Windows 7 and try to install again with Mcafee Total Protection 2011 through Mcfee online version.
Again, I got the same Installation Incomplete message.
I dont know what to do now. I am left with no option.
Please click on Useful links at the top of this page and then click on Technical support and get in touch with our support technicians , they will help you get it fixed.
Post that , click on my Avatar image and send me a private message with your service number from Tech support, so that I could get that along .