I have a HP 2740p laptop, and it meets all the requirements for the Intel widi software.
Processor: Core i5 560m
Intel HD Graphics
Intel Centrino Advanced-N 6200 AGN
Windows 7 Ultimate 32bit
I even followed the correct sequence of installation, Wireless first, then Video, then widi software. But whenever I try to install the widi software, it gives the error "This platform is not compatible with Intel Widi or the application is in use". It says "please see log for details" but I cannot find the log anywhere.
I had the same problem and I met all the requirements to run it but I found that if I downloaded one of the earliest versions of the installer then it would install correctly. I then updated it after it had finished to the latest version.