How did you install it?
Did you use Wubi(installed alongside windows)
or did you partition the hard drive
I think its a lot easier to remove if Ubuntu just runs with your current system
zeroliken
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rubberman
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There's a way to recover the MBR by using lilo but you'll need to execute it before uninstalling linux ubuntu. If you have uninstall, then you'll need to boot linux by live cd mode or through flash drive. Then install lilo from teerminal and execute the string.
More details HERE
flagstar
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