The system loaded Win PE and copied files to the SSD.
Replacing the HDD with the SSD caused an error.
The PC will not boot!
The SSD was connected by a USB cable while I attempted to Migrate the OS to SSD.
When the migration was complete I removed my HDD from the PC and replaced it with the SSD.
Thank you very much for your help. I have "solved" the problem by paying to have the drive loaded. It is worth the upgrade. My laptop boots in 30 seconds instead of 20 minutes!
I am going to upgrade my wife's laptop, when a second SSD arrives. I shall check if it is GPT. If not, I shall convert it.
Then, I shall be in touch after attempting the upgrade. If I cannot get Partition Assistant to do the job, I shall be requesting a refund. This is why I bought it!
Thank you again for the assistance.