Get access to user folder on second hard drive partition.?

I have a single hard drive with two partitions. Windows 7 runs on one partition and the new Windows 8.1 Preview runs on the other. When I'm running the Windows 8.1 Preview I cannot access my user folders on the Windows 7 partition (and vice versa) because it says that I am not the owner and I need read... show more I have a single hard drive with two partitions. Windows 7 runs on one partition and the new Windows 8.1 Preview runs on the other. When I'm running the Windows 8.1 Preview I cannot access my user folders on the Windows 7 partition (and vice versa) because it says that I am not the owner and I need read permissions. I can't use homegroup or network sharing because both OS's are on the same computer and both can't run at the same time. Any solutions?
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