Hey there, BlazedPixel.
All your data and installed programs should still be there. However, it's possible for some games or other programs not to run properly, especially if you remove the Windows associated partition, because a lot of game create their own folders with save data, settings etc. in the User Folder. Other than that if the drive i s healthy, everything should be accessible to you.
Make sure that you disconnect all other drives (besides the SSD) during the Windows installation process, to avoid future possible errors and problems.
Hope that helps.
Boogieman_WD