I have windows 8 installed. I want to remove it completely and install Linux first. Then later I might need to install Windows 7 as well.
I'm installing Linux from a bootable USB right now. If I choose "Remove Windows 8 completely and install Linux instead of it" in a dialog and take all the space of my disk for Linux (ext4), will I be able to "take a part of it back" later (when I want to install Windows), format it into ntfs and install Windows 7 there along with Linux?
Yes you may take it back, you may resize/shrink/move the ext4 partition using Gparted. You need to update-grub when you wanna do this.
But when you decided to install Windows 7 after Ubuntu has been installed, you will have to leave an unallocated partition before the partition where Ubuntu was installed. So using Gparted, you will provide a space for Windows 7, leave an un-allocated space on the left side.
When you install Windows after Ubuntu, windows 7 bootloader will take over and you will not be able to boot Ubuntu. so you need to fix your Grub Boot Loader, and let it handle your dual-boot mode.
So you might wanna read some more info about it, below are some helpful links:
Goodluck
