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Is Wubi slow?
Disk performance is slightly slower. You should not be able to notice any difference under normal circumstances. The problem becomes more evident if you have little memory and use swap a lot or if your windows partition is very fragmented. It should be still far faster than under a typical VM or LiveCD.
Is Wubi safe?
Wubi is a very safe way of trying out Ubuntu because you don’t have to partition or mess with bootloaders. There have been some booting issues, primarily with 10.04 Lucid Lynx (and upgrades from 10.04 to 10.10) due to some issues with grub updates (grub is the bootloader Ubuntu uses).
How do you use Wubi?
Run Wubi, insert a password for the new account, adjust other settings such as the disk space, and click “install”. The installation process from this point on is fully automatic. The installation files (approximately 700MB) will be downloaded and checked, after which you will be asked to reboot.
Does Wubi still work?
Wubi was removed as an installation option in the official download page from Ubuntu 13.04 onward. However, Wubi for versions after Ubuntu 13.04 are still provided.
What kind of file system does Wubi use?
Wubi creates the root.disk file using Microsoft’s proprietary NTFS file system while running under the MS Windows OS and then while the Ubuntu OS is running it accesses that file using an alternative file system driver.
Where can I download Wubi for Ubuntu 12.10?
Download Wubi from the Ubuntu Windows Installer cdimages page; this will download the latest version. You can download other versions from the Ubuntu pages on releases.ubuntu.com, e.g. 12.10, look for wubi.exe at the bottom of the page. Wubi is also included on Ubuntu Desktop and Kubuntu CDs. How do I install Ubuntu?
Is there a way to uninstall wubi.exe again?
Run Wubi.exe again. Wubi will detect that there is an existing installation and you will be offered an option to uninstall. You may want to backup the installation files (the ISO) in order to avoid having to download them again. Note that when you reinstall, the system virtual drive (root.disk) is reset.