1) Begin with Acer Netbook Aspire One Windows 7 starter
2) Partitioned drive and installed Ubuntu 12.04.1 LTS on separate partition
3) Has worked very well for a long time can boot windows or ubuntu - I love it I can access windows drives from ubuntu and move files between at will until now
Problem is Ubuntu Home folder has lost the windows partition "Acer" from the list of Devices where it used to show "Acer" (name of windows partition) "system reserved" (name of windows recovery partition)
It now shows only "system reserved"
I have somehow deleted or removed "Acer" from the list of Devices when logged on as primary owner user If I switch users and log on as guest the list under Devices shows "Acer" "System Reserved" and file manipulation works as it should between Ubuntu and Windows partitions
If I boot windows it works as it should
How do I restore "Acer" to the devices list when logged on as primary owner user