2.3) When I try to log in, all I get is a blank white screen.
It seems to be a problem with your browser's cache and it usually helps to clear it. If you are not sure how to do it, try to apply the following procedure:
Mozilla Firefox: Tools / Options / Network / Offline Storage / Clear now
Internet Explorer: Tools / Internet Options / Temporary Internet Files / Delete Files
Opera: Tools / Preferences / Advanced / History / Disk Cache / Empty Now
WebTV: Clearing cache with WebTV is very easy. Simply power off the unit completely and turn it back on. (Using the "Hang Up" option is NOT enough. The "Power" button must be used. Sometimes a "Hard" clearing of cache may be necessary. To do this, power off completely, and unplug every wire connected to the box. 15 minutes later, plug everything back in and power back on.
And when it is done, don't forget to restart the browser.