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i have a windowsXP OS, but the system down and i can't open it, so i decide to install ubuntu. i installed it in my USB how to force the computer to boot and read from flash and install the ubuntu, without opening the windowsXP system ??

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You dont need to install ubuntu to use it. You can create a LiveUSB from which you can directly boot and use the system without actually installing the OS. – AsheeshR Jan 12 '13 at 16:47

On my computer sign ACER, and before booting OS you should press F12. Then you will say Boot menu - choose Hardware and then FLASDISK.

But it dont have to work also on your pc.

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i installed ubontu in my USB and extract it. does the computer understand that i want to install the OS ??? – nisreenkh Jan 12 '13 at 16:47
USB = Flashdisk. Computer will understand, if you have on it ISO live image of current version – romann175 Jan 12 '13 at 16:48
no i don't have it in IOS version .. how to make it like that ? – nisreenkh Jan 12 '13 at 16:51
for ubuntu 12.04 - maybe here: – romann175 Jan 12 '13 at 16:53
does i do it using ULTraIOS program ??? – nisreenkh Jan 12 '13 at 16:54

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