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I want to install Windows 7 again on my notebook over kubuntu 10.04 that I used for few months. Issue is that ext partion where is Kubuntu is locked somehow and can't format it/ delete it with Windows install.Any ideas how to trick this?

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Do you mean Kubuntu 10.04? – MDMarra Sep 1 '10 at 23:02
up vote 0 down vote accepted

I'd boot using (K)/Ubuntu Live CD, and use the partition manager or gparted to remove the partitions.

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I end up doing same thing, just deleted the partition with gparted in live cd and use the free space to make new ntfs one.Typing from win 7 :) Thanks – Balchev Sep 2 '10 at 8:31

Or use Live CD and dd command to zero out the first few blocks.

dd if=/dev/zero of=/dev/sda (or whatever disk your netbook primary is) count=20

Afterwards, Windows will see an "uninitialized disk" and will let you proceed with install. This assumes you're not wanting to keep anything from the netbook HD.

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