Why wlan why?

Yes, you should have mentioned that. In fact, you did mention it before you edited it out of your original post.

Fine, but you used a leaked Product Key, and a version of Windows that I'm about 99% sure is pirated and hacked. When you reinstall Windows 7 you need to use a genuine version and activate it with the Product Key on the COA sticker.

Make use of this Microsoft site and then please give us another MGADiag. Even though your problem will almost definitely be solved then, please show the MGADiag so that we can rest easy that you are now running genuine Windows. :) Thank you.