Failed to install Flash Player 15.0.0.223

Hi,

Once again we have Windows 7 64 Bit edition  and we use SCCM 2007 to push our programs packages. We use Internet explorer 10 for Navigator.

We have package the latest flash who is version 15.0.0.223 and when we arrived to delete the folder in c:\windows\syswow64\macromed there is always a file .ocx that we cant delete unless we closed internet explorer.

The previous versions let us delete that folder to install the new one but not that one, do you have an idea?

Thanks

Math