User Activity

My MX860 is connected via WLAN to the home network.  In the last two days the print dialog pops up indicating "Creating Print Data"  there is a progress bar that does not appear to get anywhere.  After a while (longer than usual) the printer wakes up...
I upgraded to Windows 8.1 yesterday.  I can't scan now.  "An error has occurred in the scanner driver.  Abort scanning."  I installed latest drivers and continue to get this error.  I am connecting wirelessly.  What do I need to do?