Try rebooting. Also try logging in with a different user account on the computer. let us know if either works.
Already had tried both with no luck.
We don't know if you don't tell us.
You should probably reinstall.
I have uninstalled then reinstalled (twice). I have uninstalled older versions of InDesign. I have rebooted the system. I have repeated all of those in different orders, just in case there was some magic in there.
Given that you have had previous installations (like InDesign CS6) navigate to
and try to remove the contents of InDesign Recovery folder except for the file called RecoveryData. I also deleted InDesign ClipboardScrap files.
Then I went to
and noticed, that I had "Adobe InDesign" folder that contained PREVIOUS installation (9.0) and "InDesign" folder with the current version (10.0). I deleted first folder (Adobe InDesign), renamed "InDesign" to "Adobe InDesign" went into it:
C:\Users\[user]\AppData\Roaming\Adobe\Adobe InDesign\Version 10.0\en_GB
and renamed InDesign Defaults (InDesign will recreate the file during opening, but you'll probably have to backup the workspace files.)
Then with the heart in my throat I launched InDesign and it f**king worked!!!
If that doesn't do for you mail me at firstname.lastname@example.org because I recreated the procedure from memory so I could have forgotten something important! But I'm 99% sure it was all I did.
HOPE it works for all of you too!