I have run into a similar issue when trying to run Android-x86. When it gets to the Wi-Fi page, and starts looking for wireless networks, it just sets there.
I'm beginning to think that this issue has something to do with whether or not your Wi-Fi hardware is compatible with Android-x86. I'm running Android-x86 on my desktop with a Wi-Fi dongle.
I searched this issue, online, and came across the following post:
It's an old post, but it talks about compatible Wi-Fi cards. If you read it, you'll notice that only one compatible Wi-Fi device was suggested. Unfortunately, that Wi-Fi dongle is obsolete, and now hard to get.
Prajna Sariputra may be onto something. If you posted details concerning your Wi-Fi hardware, it may be easier for someone to help.
I'd love to try a USB Wi-Fi dongle, that is known to be compatible with Android-x86. That would allow me to verify that it's a hardware compatibility issue. It could potentially pinpoint your issue, as well. However, finding a list of known compatible Wi-Fi devices, is tricky. I haven't been able to find a list, after extensively searching online.