Try this uninstall mcafee via the MCPR removal tool found in the removal faq in useful links tab top of this page.
Reboot and run mcPreinstall.exe tool. http://download.mcafee.com/products/licensed/cust_support_patches/Mcpreinstall.e xe
Retry the installation from your account. Oh the backup is not available on this version
Thanks for the help. I tried the steps you outlined. However, seems exactly same problem is still occuring.
In that case you might still have an issue with malware Try downloadin getsusp here
You will have to join the group and post the results a thread and the tech working on the program will report back what he finds.
If you want a second opinion, or to be on the safe side, then you can do a scan with the free versions of these tools :
If you already have Malwarebytes installed, the virus could be protecting itself against it. In that case, in order to get Malwarebytes running you'll need to rename the executable. Open the C:\Program Files\Malwarebytes Antimalware folder, then rename the "mbam.exe" file and double-click directly on the file to open the program. After updating the program, run a full system scan using Malwarebytes.
Make sure both programs are updated to the latest versions before running them and let them clean anything they find. If they quarantine a file or fail to remove a file try to get a copy of it and send it to Mcafee using the virus submission path described here :
Send the file to mcafee labs at http://vil.nai.com/vil/submit-sample.aspx
Installin McAfee on computers with virus infections an sometimes be slow , and the virus scan could tend to fail if the machine has some remnants of McAfee . In your case I supect it might be a conflict with the other security scanner that is installed in the machine !!!! Did you remove spybot before reinstalling McAfee applications ?