Solve : unallocated HD, don't know how to get it working again?

1.	Solve : unallocated HD, don't know how to get it working again?
Answer» I've been working on my computer lately and at one point yesterday I REALIZED Windows wasn't detecting my main 2 HARD DRIVES ( I just completely restored windows so this hasn't going on till just now). So I installed Ext2 so that my computer may be able to detect them, which it did. Linux was on both of them, and so I decided to reformat and I started on one. After that was finished the other one wasn't detected by Ext2 anymore, and windows displayed the hd with a question mark.Windows recognized there was SOMETHING there, but it didn't know anything about it and I couldn't do anything with it. I'm running on a disc VERSION of Ubuntu right now and it says the disc is unallocated yet it knows how large the disc is. I still can't do anything with it though, got any suggestions on how I can make it usable for windows again?

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