Before someone yells and says "This belongs in networking", I don't think it does since I didn't have these problems on Windows 7 machines. Here's the deal - I recently put together a computer for my son. He insisted on Windows 8, so we put Windows 8 on his machine. Since the machine is going in his room which is somewhere ethernet isn't available, I popped in one of my spare wifi cards, which happens to be a Rosewill PCIe 802.11n card. Worked fine in the previous machine it was in. I also have another one of these cards in a common computer for my kids/wife to use running Windows 7 that works without issue. Here's the issue that I run into: Windows 8 computer boots, computer sees wifi network, computer connects to wifi network. Sometimes computer will pull a valid IP, sometimes computer will not pull a valid IP. Regardless, computer absolutely will not connect to the internet OR local lan. Here's the kicker... if I go and reboot the router, the Windows 8 computer will connect to the network just fine AND will have full connectivity for an arbitrary length of time. From what I can tell, at least until the machine is powered down for a length of time, and then powered back on - at which time connectivity issues reappear. What's more, I know it isn't just a "flaky network card", as I also have a realtek based USB wifi adapter, which ALSO exhibits the exact same behavior when connected to the Windows 8 machine and NOT when on a Windows 7 machine. To further complicate the issue, both the WHQL drivers shipped with Windows 8 and the ones posted on Realtek's site are the same (they haven't been updated since May of 2012). My google-fu is weak on this one, and I can't seem to find any sort of corresponding information for this issue. Is this a known issue with Windows 8 and wifi? Has anyone else encountered similar issues with Win8 and wifi?