.Net framework 4.5.Installation and message 'waiting for another install to complete'

I am trying to install the .Net framework 4.5.2 from Patch Installation Package. I am successfully able to launch the setup.exe from custom action.

But setup starts, it halts with message Waiting for Another install to complete.

After careful examination of processes I found that when I launch the .msp package I am using to install the patch there msiexec.exe processes are started. The .net framework detects those processes and stops the installation. If I manually kill those processes the .net framework installation starts and completes successfully.

My question is :

- Is there any mechanism by which I can instruct installation of .net framework to ignore the running msiexec processes.

- I never faced this problem when .net framework 4 is installed with my base DVD package through setup pre requisites. I am using same setup.exe switches. Does anybody know what is difference when setup.exe is launched from pre requisites and custom action.

- Any possible fix for above issue.

Thanks in advance.

Amarjeet