My Windows has been acting up a lot lately and I want to reinstall it. However, I also want to keep my dual boot. I'm currently running Ubuntu 14.04 and Windows 10 64bit. I saw the thread about reinstalling Windows 7 while keeping dual boot, but that resolution requires a Windows 7 disc. Ubuntu is on it's own partition, but Windows thinks it's empty(even though it definitely isn't). Windows Disk Management

It would be much appreciated if someone could help me with this.

  • Format C drive and install windows then repair grub it will work – vembutech Jun 22 '16 at 18:12

While not a full reinstall you could try doing a "factory reset" on Windows 10. This is under Settings > Update & Security > Recovery. Press the "Get Started" button for Reset this PC.

I recently had to do this for a VM that was acting up and it reset Windows 10 to a fresh install. But your mileage may vary based on what's wrong.

As far as I know this won't touch your boot partition.

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