My computer is dual boot system, it's on two partitions. Windows 7 is installed on the C drive and Ubuntu-12.10 is installed on the D drive. Ubuntu was installed using wubi. I need to reinstall Windows 7, would like to know if it will affect the Ubuntu installation.
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Mainly the two OS won't impact each other by a reinstall, since they are placed in seperate partitions.
But during the boot of your PC, there appears a so called Boot Manager, which lets you decide what partition you want to boot from: Ubuntu or Windows.
It should be safe to reinstall the system that provides the bootloader (at least the Ubuntu Bootloader Grub would automatically find the Win7 installation).
In your case: If your Boot loader is provided by Ubuntu you can reinstall Win7 without any fear.
If you don't know whether you're using the Win7 or Ubuntu Bootloader think about what system you installed second - this one probably provides the bootloader (assumed you didn't configure anything manually). Furthermore the Win7 Bootloader has a Windows-Start-Manager as a header - so you probably would notice that ;)
Max
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Depending on how your system is set up, it can rewrite the boot manager leaving you unable to boot into the other OS.
David Schwartz
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