Removing debian from hdd

[Guido Martínez <mtzguido@gmail.com>]

Hi,

I recently borrowed a hard drive and installed debian on it, alongside windows. I used it for a couple of weeks.

Later, I tried to remove debian by deleting the partitions I had installed it on, but that caused grub to fail horribly, and I had to reinstall debian.

How can I remove debian? Can I make grub ignore that partition and then delete it?

Thanks!