Logged into my Windows 7 PC using Cisco VPN and was greeted by an all white display (no background or icons) except for the task bar. When I click on the display the task bar disappeared. When I logged in at work this morning I got the same result. I have dual monitors, so I tried setting the display to use only my main monitor....same result. I reverted back to the original dual monitor display... same result. Then the desktop appeared as it normally would. Any idea what would cause this?