Windows 7

Ok so I had installed Ubuntu on my sisters laptop using Wubi. One day I was in Ubuntu, and I had GParted open and I was formatting a flash drive. Now what I think happened was I selected the main hard drive, and formatted it. She was pissed! So I had a copy of the windows 7 beta, and what I ended up doing what installing it. I thought great fine, she won't be mad at me. Well in the back of my mind I knew that it will stop working, and I found out that the day is coming... soon. But the way is will stop working is, every 2 hours it will shutdown. As I am writing this at 12:40 AM, she is in her bed sleeping, I'm fucked!