[ubuntu] Hdd Failing? Or Vista/Ubuntu clash? Help!

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http://ubuntuforums.org – I installed ubuntu using Wubi on my laptop. It has windows vista home premium. After i installed ubuntu and started using it gave me a pop saying that my hard drive is probably failing. I dont know why this is. Can some one help me? Is it possibly just because i installed ubuntu on the same drive as vista and it cant access vista files? It said something about my boot sectors. Please help i am looking forward to using ubuntu. And i can still run vista as well. I have 160 gig hard drive with over 30 gigs of space left. (Hardware)