I have my pc with dual boot Windows 7 and Ubuntu 12.04. I have a a partition of 62 GB on which I created a Virtual Hard Disk Image using VirtualBox from within Ubuntu and Installed Joli OS. After I uninstalled Joli os and uninstalled Virtual Machine, I still Can not recover the disk space that was occupied by the Virtual Disk Image though I am unable to find the Virtual Disk Image. Can someone help me and tell me how to solve the problem?
Depending on the version of VirtualBox, the Virtual Disk Image files may be stored in the hidden folder
When you say you are 'unable to find' the files, did you try:
(assuming you used the default Virtual Disk Image type of file (i.e. '.vdi'))