Hello Ashraf,
Sent you a W7 install crash log on this, which you promptly tossed. “This post is awaiting moderation”, your site replied. (I’m noting a disturbing tendency on the part of some sites like this, towards zapping most comments that are anything other than an enthusiastic, rubber stamp approval. That will drop their credibility right off the edge of a steep cliff !)
Anyway, I downloaded the install stub again, just in case there was some corrupted d/l. Same results — a crash. Then, as an experiment, I temporarily turned OFF Windows Defender / Security Essentials (Microsoft’s own anti-malware program), and this allowed the program to complete the d/l and then install. Someone might want to know. But you will probably delete this comment too.