It seems Privoxy doesn't play well with Windows 8 (x64 PRO). Desktop apps works well, but various metro-UI apps like the built-in application Store doesn't. Others, like default windows games which using the metro UI (e.g. minesweeper) has various issues, unable to connect to XBOX live account, timeouts. Store either says "there is no internet connection" or just hangs at a white screen or startup screen. Tried with privoxy started as a user mode app or as a service as well, with same results.