I bought Pavillion DV6 6165TX yesterday. I was trying to install Ubuntu, but all got messed up while installing Ubuntu. Now Windows also does not boot up. It shows this message: “Windows failed to start. A recent hardware or software change might be the cause.” Unfortunately, I don’t have recovery disk. Now how to reinstall Windows 7 (Home Premium)? My friend has the same model and Windows 7 (Home Premium). Can I borrow his recovery disk? Please help me!