Just a heads up. If anyone is trying to migrate their OS to an SSD (or from one SSD to another) I highly recommend trying Paragon Hard disk manager 14 first.
It was the only program that was able to migrate Win8.1 successfully for me, from my stock Lenovo laptop drive to a 128GB Crucial mSATA SSD in about half an hour...After 12 hours of trying other solutions that continually failed to boot.
Then, today I used it again on my desktop machine to migrate from a 64GB Crucial M4 to a 250GB Samsung 840 and it migrated Win8.1 successfully in under 5 minutes!
So save yourselves the hassle I went through and give this a go. The trial works for migrating the OS also.