Please try the following steps and let us know the status ;
Click on Start – click on control panel – click Programs and features
From this window , check if you have any other security (Antivirus) program, If found uninstall the same .
Open Internet Explorer – Click on Tools – click on Windows Update and install any available update from the website .
Run the McAfee removal tool from here : http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe and restart the PC
Run the McPreinstall tool from here : http://download.mcafee.com/products/licensed/cust_support_patches/McPreInstall.e xe
Logon to your McAfee account : http://us.mcafee.com/root/login.asp and reinstall your programs.
If you still encounter the same issues, please click on useful links at the top of this page and contact our support chat technicians they would help you get the programs installed .