I had two operating systems on my computer: Windows 7 and Linux mint. When I installed Linux, GRUB became the master boot loader. GRUB lets you choose which OS to use when starting up.
I wanted to expand the space of the partition which I installed Linux on, since it was too small to fit some Steam games.
So I went to Windows, and installed some third-party disk partitioning tool. I then shrank the Windows partition, and created a new 30 GB one.
When I rebooted, GRUB went into recovery mode and it could not find the boot configuration file.
I then thought that using a live CD to start up would help to fix GRUB. But it always overrode the DVD/CD drive and went straight to GRUB recovery. And of course, I couldn't use GRUB to recover.
So then I knew that I was doomed, although all my data still existed. There was nothing I could do to recover the data.
So I gave up, and said, "To hell with the data.". At least a copy of Blockland that had my settings was stored on my hosting service's VPS. I still have a lot of the Java programs I made for my hosting service on the VPS.
I was lucky to have a copy of Windows 8 64-bit on hand, so I am installing it right now.
Yes, I messed up big time with the partitioning.
