Tried all of this in the past.  Nothing works.  Dell has apparently installed a defective copy of Windows 8 on my computer.  Three technicians have tried to help and have been unable to upgrade my system to Windows 8.1.
Has anyone been successful upgrading an XPS 8700 from win 8 to 8.1?  If so how did you do it?  Nothing seems to work for me and I get no help from Dell support.
Upgrade XPS 8700 to Win 8.1