Yes Factor I am typing on same pc. After a system restore it was back to normal but as soon as I switch off then switch on again It comes up with navigation to the web cancelled. So I have to do a systems restore to get back to normal again. This has only happened since it downloaded the usual updates.
Go to Windows Update (after a system restore) and see how many updates are waiting to install. If there is more than one, install them one by one, restarting after each. This will let you know which one is causing the problem.