For "some reason" Google Chrome no longer is able to connect to any website, eventually failing with:
Error 7 (net::ERR_TIMED_OUT): The operation timed out.
Other browsers (Firefox, IE10) on the same host are unaffected. According to chrome://chrome/history/, my last successful page get was on 6th November.
Re-running the installer doesn't bring anything up.
Wierdly, Chrome does work if I am running Fiddler (and only if I am), even though it is configured to not use a proxy.