S405 Wireless Connectivity Issue. Help Please?

Hi, I recently purchased an Ideapad S405 and I'm having some WiFi connectivity problems.
Specifically, my laptop has trouble connecting to one wireless spot. I have no problems connecting to my router at home, school, and other places, however I can never connect to my friend's router. This isn't such a big deal because it is just one access point, but its rather frustrating since my friend's place is incidentally my favorite study spot.
When I attempt to connect to this router, it always says that it has limited connectivity. When I try to diagnose or troubleshoot the problem it usually tells me something about default gateway not available or problem with wireless adapter or access point. I've tried setting the router to open access with no password but it doesnt make any difference. I also updated the wireless driver but it still doesn't work.
If anyone has an idea on how to fix this or if anyone knows of a workaround, it would be greatly appreciated. Thank you!
Additional Details:
Laptop - Lenovo S405
Windows 8 64 bit
AMD A6-4455M Processor
The modem/router I'm trying to connect to is an ARRIS TG862 provided by comcast.

Hi,
I've had the same issues and sometimes keep having them with my router at home and no it isn't the router either. It is Lenovo's horrible DRIVERS that are the problem.
I had this issue from the begining and then it got fixed with latest drivers found here
http://support.lenovo.com/en_IN/downloads/detail.page?&DocID=DS032605
Note - if u cannot see the drivers, select ur model S405 and then go ahead.
But I cannot fully guarantee that it will work. As I still face the issue off and ON. And to make matters verse, their latest video drivers for Win8.1 suck even MORE. Been having video crashes left right and center and I cannot change brightness either! Lenovo doesn't respond, Lenovo ur software support SUCKS!!!
Check out my resolution video problem here.
http://forums.lenovo.com/t5/IdeaPad-S-series-Netbooks/Lenovo-S405-Video-Driver-Crashes/m-p/1402461

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~~~~~~~~~~~~~~~
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