I did some research on the internet and so have found that this network card type (Broadcom) was prepared simply wrong, and it's virtually impossible to improve the wireless connection. This problem was already known at Sony. That's why I do not understand why they are selling these devices even when they know for sure that the WLAN is not to work with most customers. I have made contact with Sony. We have carried out any software updates, installed various drivers, adapted router settings, all to no avail. Sony has suggested to me that they send me a wireless stick for 100 euros. Of course I did not want to invest a further 100 euros in this broken unit. I thought it was a kind of impudence that they still ask for money from me.
After that I made contact with Amazon. Unfortunately, the device was now older than 1 month and a simple return is no longer possible. So you can send instead to a Repair me the Sony Vaio. There, the laptop was not tested. Instead, they immediately, without thinking, put the operating system and installed a few updates. The updates I had also made before that even. So the laptop came back and the problem with the Internet is now even worse. Not only does the connection still does not work properly via wireless, the cable connection was no longer functioning properly.
After further consultation with Amazon, I have the Vaio again sent back to the repair service. This time they have actually tested, but wrote to me simply that the problem does not exist. Of course, it is clear that a test looks at so a Repair as follows: turn off the unit, establish the Internet connection to call on Google, yes, it works, and that's it. But the problem was not that I could not call your first web site, but that I could not work for an extended period with the computer. It was impossible to send an email because the connection is already terminated, while I wrote a long e-mail, and then I could no longer ship.
I then informed again the problem Amazon. Amazon behaved very professional and gave me the opportunity now but the faulty unit back to you, and get refunded my money, which I am very grateful. You can see it, that is very important as a customer for Amazon. I order several times a month something on Amazon, and I continue to remain a customer of Amazon.
So I give 5 stars for Amazon, 0 stars for Sony, because their work and attitude just is not assessable.