IE10 issue on Windows 8 Professional 64bit

I had occasion to set short cuts to the BBC and Facebook pages on my Taskbar. You do this by dragging down the tab to the taskbar when the page is open at their web site.

After launching IE10 from these taskbar icons I found that when FILE EXPLORER was launched elements usually found there had vanished! For instance, I could see the LIBRARIES but could no longer see the drives or My Computer.

Signing out and signing back in restored the FILE EXPLORER display to normal, so did a RESTART of the computer.I can repeat this problem at will.

How do I report this to Microsoft?