Thanks Joe...
Today I returned the machine to the vendor...
Now I found the same type of laptop (Lenovo Thinkpad S531) with the following hardware:
Intel® Centrino® Wireless-N 2230
Intel Core I7 3537U 2,0 GHz
Graphics: AMD Radeon HD 8670M, plus Intel HD Graphics HD 4000
Unfortunately, the vendor's technical support could not tell whether this machine is capable for WIDI...from what I've learned with the above mentioned hardware a computer should be able to run WIDI. Can you confirm?
Thanks & Regards...
Ocki