I want to uninstall my Ubuntu 12.04 (installed using Wubi). My Ubuntu is on one of partitions that I don't want to delete my partition.i using win 7. And I don't use grub
3 Answers
To uninstall Ubuntu (if you installed it using Wubi), simply go into Programs and Features from Control Panel in Windows 7, look for Ubuntu and uninstall it, just like you would uninstall any program in Windows (see image below). It will not delete the partition, it will only delete the files that it created on that partition.

If this did not work, or for more information about Wubi uninstallation (or general Wubi information), click here
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from windows7 manually delete home folder
now, if you have grub as your boot manager its not advisable to delete anything else.
if your boot manager is the windows one you can delete manually the other folders of ubuntu
for future reference: use Gparted to organize your hard drive before installing any OS so this wont happen again.
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