Hello, how are you?
My name is Paloma B., I am very happy to be able to try to help you in the best possible way.
It could be that some files or partitioning is allocated in wrong place, that's why removing the old disk has affected.
In this case, the best thing to do is remove the old disk and do a new clean install of Windows on the new SSD, I believe this will fix the boot problem.
For this, you will first need to create a Windows installation USB, just follow the topic below. If necessary, you can create the USB on another computer.
http://answers.microsoft.com/en-us/windows/wiki...
After completing the creation of the USB, follow this thread, it is very detailed and will assist you in the clean installation of Windows.
***If you have any questions on how to start the USB installation, you can refer to this guide please.
https://www.groovypost.com/howto/bios-uefi-setu...
http://answers.microsoft.com/en-us/insider/wiki...
I await news.
If these procedures helped you in any way, please click on "I solved my problem" and also mark as an answer, so you can help others users.
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Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.