OS Installation Exercise

I think I’ve seen the OS installation screen more than 10 times for the last 7 days.

No, I didn’t format the whole of my desktop or my laptop.

A couple of times for the installation of Windows XP on a virtual machine on my desktop. This is for final year project.
And another couple of times for the installation of Linux on my laptop’s partition. This is for a project on embeded systems.

Why so many times? As I am a total noob in these stuff. Kept tweaking here and there without knowing much and end up having to reinstall.

I hope I wouldn’t have to install another OS for the next couple of months. I’m so sick of it.

Sick of studies even more.