Windows 7 makes a "System Reserved" partition on a drive when it installs. Important start up stuff is there.
This partition doen't show up in Explore, but does in Disk Management.
I don't recommend cloning a HDD to a SSD!I always do a fresh/clean install.
Granted, I have all my "important" stuff backed up onto another drive, and don't mind re-installing all my programs. With a SSD, it's way faster. And I have most of my install programs copied to a HDD, because a couple of the disks are scratched. So my installs are all really fast, it's the personalized settings that slow me down.
So, if you can, clone the System Reserved partition, else you'll have to do a fresh install.