Please refer your mail regarding upgrade. After I got notification for upgrade to 15.10 I proceeded forward for upgrade. Every thing was ok during full download but at the boot option I get the following- "Ubuntu Advanced options for ubuntu........ Memory test....... Memory test...... Windows 10 (loader)...... Windows Recovery.........." I selected first option then I got the following - [ok] Started Wait for all 'auto"/etc/network/interface [ok] Reached target Network is Online [ok] Started Set console key.... [ok] -------- ---------- [ok] Satrted udev Kernal Device Manager Starting Show Plymouth Boot Screen" After this I waited for long time but nothing is happening. I shut down again there is halt at this place. Thank god Win 10 is working. Please guide what to do. I cannot approach you through Launchpad. On Sat, Feb 6, 2016 at 1:24 PM, Inderjit Singh