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I know it has been 6 or 7 months since you reported this, but I just fixed this in the SVN version. QtEmu now commits unsaved changes when you uncheck the snapshot mode checkbox while the virtual machine is running, allowing you to install software or save files or whatever. even better, this means that you could install the software completely with the snapshot box checked, and then uncheck the box to save changes after you have verified the installation went smoothly.