I have a laptop with Windows 8 x64 (with all the latest Windows Updates installed) with a 6230 card, running the latest 15.3.50 drivers found on Intel's website. When I connect my laptop to my Nexus 4 Android phone (using the WiFi hotspot tethering feature of the phone), I get a BSOD.
* I do NOT get a BSOD when I used my previous Android phone (LG P509, not sure what the WiFi chipset is) as a WiFi hotspot (yes, using the same computer, card, OS, drivers, etc.).
* I do NOT get a BSOD when I connect to my router's WiFi hotspot (Atheros AR9220/9223 chipset).
* I have NOT experienced a BSOD with any other hotspot that I've connected to.
* Reverting to the default driver that shipped with Windows 8 (14.2.1.3), FIXES the problem.
* I have another laptop, also running Windows 8 x64, but with a 6250 card running the latest 15.5.6 drivers, and there are no problems there, either.
* The latest Windows 7 drivers (15.3.1) exhibits the same problem.
* Sometimes it BSODs as it is establishing the connecting, and sometimes it BSODs after a minute or two of light usage after connecting. If it survives long enough to see some usage, the speeds are extremely slow.
* The BSODs always fault in netwsw00.sys, though the faulting code is often different. Sometimes it's an unhandled exception, sometimes it's IRQL_NOT_LESS_OR_EQUAL, etc.
* Sorry, I have not been able to test this with Windows 7, so I am not sure whether this is a problem that is specific to Windows 8.
So to summarize:
* 15.3.50 and 15.3.1 are both broken
* 14.2.1.3 (older driver) works
* 15.5.6 (newer driver, not available for the 6230) seems to work (or I guess it could be because of the different card/computer)
* I see this BSOD only when connecting to some hotspots (in my case, the Nexus 4's hotspot) while most other hotspots seem to be fine.
Also, why did the 6250 get the latest 15.5 update while the 6230 was relegated to 15.3? The 6250 was released in 2010, while the 6230 was released in 2011, so why is the 6230 seemingly relegated to a deprecated status, not getting a "real" Windows 8 driver (I inspected the driver's INF), while the *older* 6250 was one of the cards to get a "real" Windows 8 driver in the form of 15.5?