In the Win 7 "System Restore: Confirm disks to restore" dialog, I see that HP(C:)(System) is "Ready to restore" but there is another that cannot be found, which makes me think that something is awry.
But when I go to the Disk Management dialog, HP(C:) is shown as "920.23GB NTFS (System, Boot, Page File, Active, Crash Dump, Primary Partition)," which seems to be assuring me that there is no problem with Windows.