Thank you Bojan I will try your suggestions.
Tried both suggestions but neither worked. All the details were already in the registry. I am using Windows 10 and the reason I had to reinstall Lightroom 2015cc and Photoshop 2015cc was that I had to do reset on my pc as I was unable to get passed the login page for four days. Didn't get much assistance from Miicrosoft.
Let's have more detail then... OS would be a great start. An uninstall/reinstall (AFTER LR is installed) usually does the trick.
If it still Does't work Post reinstalling then Please reset Photoshop and Lightroom Preferences.
Photoshop:- Press and Hold down Alt, Ctrl, and Shift keys (Mac: Command, Option, Shift) while starting up Photoshop. A dialog box will appear asking if you wish to delete the preferences/settings file. Select yes
**Note:-Make sure to backup Presets/Actions/Modified Workspaces/Plugins (if any)
Backup your Catalog First
Choose Edit > Catalog Settings (Windows) or Lightroom > Catalog Settings (Mac OS).
Choose Back Up Catalog > When Lightroom Next Exits.Close Lr and select backup
Once done Try Resetting Preferences.See Resetting Preferences in Lightroom CC/6 | Lightroom Blog
Let us know if that helps
Do you actually have Photoshop installed on your system?