If you are getting this error:
Could not write value Class to key\Software\Classes\CLSID
Please open the Regedit and go to:
Then review this post to change the permissions:
NOTE: Skip Step #1 because you are using CLISID key and you must execute Step #6 in order for the permissions settings to work properly.
Thanks to Martina Foss for confirming this solution and Avto Chachava for pointing me to the location of CLSID.