I recently upgraded my laptop to Windows 8.1 RTM and attempted to use Internet Connection Sharing (Wi-Fi tether) on my Windows Phone 8 HTC 8X to do a Lync demonstration at a customer site. Every time I connected my laptop to the hotspot, Windows would immediately blue screen (BSOD). I found several existing posts that described the issue with the suggestion to enable FIPS on the Wi-Fi connection.
I was not able to enable FIPS fast enough to prevent the BSOD after connecting to the hotspot. I could not figure out how to modify a hotspot’s settings unless you are already connected to it with Win8.1. I was finally able to fix my issue by modifying the hotspot settings from the command line.
Open a CMD prompt with Admin rights and execute the following substituting in the name of the Windows Phone hotspot:
C:\>netsh wlan set profileparameter name="Hotspot Name" fips=yes
Feel free to comment if someone knows how to edit hotspot settings BEFORE connecting in Win8.1 via GUI.