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#11
If there's still an OS on E it is now booting off of System Reserved on Disk0 since D has no System flag. This is what happens when you don't unplug the other HD when installing.
Is Disk0 the SSD which you want to install Win7 upon, and do you wish to abandon Disk1?
Unplug Disk1 to see if the performance problems persist.
What do you want to do with Disk1?