Thanks Ann,
MJPEGCodec_RETAIL_v3.2.4 did not install properly,and the email to MainConcept bounced back on Gmail. I tried to download several time to make sure this was not a corrupted download. No change.I tried to run in Win compatibility mode, same problem (error 1628: Failed to complete installation, OK)
I use a Dell Optiplex 9010 Intel Core i7-3770 cpu at 3.40 GHz, 8 GB ram and 64 bit OS (Win 7 pro, SP1.