About 1 year ago, I installed Kali Linux alongside Windows 7. I made 2 primary partition (ntfs) and an extended partition for Linux. The first ntfs partition is used to install Windows 7, the other one is a big shared partition for general purpose data. The extended one contains 3 logical partitions : one for / (ext4, also contains grub boot-loader), the other for /home (ext4) & the last is a swap.
After some time of using Linux, I started feeling that I was using the wrong distribution. Moreover, it started to have a lot of errors, so I wanted to get ride of it -- but I want to keep the 2 ntfs partitions and Linux's /home partition untouched.
What are the precautions I need to take in consideration in order not to lose the /home partition and keep Windows installed alongside the new distribution (boot-loader precautions)?
The current Linux distribution is 32-bits & I am going to replace it with 64-bits Debian 9 (stretch).