I'm using a windows 8 machine plugged into a LAN and trying to use the network's proxy server. The proxy requires authentication but the machine is not a domain PC.
This approach worked fine in XP and Windows 7 as the first request that hit the proxy (e.g. through IE) triggered a login prompt so I can enter my network credentials. After that it all works fine and I could access the internet from any program which made use of the IE proxy settings. In Windows 8 though no login prompt appears and the machine eventually locks up (can't even do a control-alt-delete. I've tried using CNTLM which works for a while then itself eventually freezes. Programs which use their own proxy settings such as Dropbox and firefox work fine.
So the question is what are the differences between Windows 7 and Windows 8 relating to proxy settings? Something must be preventing the authentication prompt in win8 but not in Win7. I've read that defaults relating to whether or not to use NTLM 1/2 or LM authentication but I don't know if that's related to my issue
NB: This question is not related to metro apps :)