OK... the following is the results of comparing the two registry files. The section "Reg2" is the registry that I was having the problem with. The section "Reg3" is the restored registry that works. Note that there a 5 entries in the problem registry, and 10 entries in the working registry.
Missing ClassID
Reg2
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}\InProcServer32]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,65,00,78,00,\
70,00,6c,00,6f,00,72,00,65,00,72,00,66,00,72,00,61,00,6d,00,65,00,2e,00,64,\
00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
"LastKey"="Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Classes\\CLSID\\{56FDF344-FD6D-
11d0-958A-006097C9A090}"
Reg3
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}\InProcServer32]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,65,00,78,00,\
70,00,6c,00,6f,00,72,00,65,00,72,00,66,00,72,00,61,00,6d,00,65,00,2e,00,64,\
00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{56FDF344-FD6D-11d0-958A-
006097C9A090}\InProcServer32]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,65,00,78,00,\
70,00,6c,00,6f,00,72,00,65,00,72,00,66,00,72,00,61,00,6d,00,65,00,2e,00,64,\
00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{56FDF344-FD6D-11d0-958A-
006097C9A090}\InProcServer32]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,65,00,78,00,\
70,00,6c,00,6f,00,72,00,65,00,72,00,66,00,72,00,61,00,6d,00,65,00,2e,00,64,\
00,6c,00,6c,00,00,00
"ThreadingModel"="Apartment"
[HKEY_USERS\S-1-5-21-1310488628-551009281-1505269296-1000\Software\Classes\Wow6432Node\CLSID
\{56FDF344-FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_USERS\S-1-5-21-1310488628-551009281-1505269296-1000\Software\Classes\Wow6432Node\CLSID
\{56FDF344-FD6D-11d0-958A-006097C9A090}\InProcServer32]
@="C:\\Users\\Henry\\AppData\\Roaming\\xaeojhej\\colers.dll"
"ThreadingModel"="Apartment"
[HKEY_USERS\S-1-5-21-1310488628-551009281-1505269296-1000_Classes\Wow6432Node\CLSID\{56FDF344-
FD6D-11d0-958A-006097C9A090}]
@="Task Bar Communication"
[HKEY_USERS\S-1-5-21-1310488628-551009281-1505269296-1000_Classes\Wow6432Node\CLSID\{56FDF344-
FD6D-11d0-958A-006097C9A090}\InProcServer32]
@="C:\\Users\\Henry\\AppData\\Roaming\\xaeojhej\\colers.dll"
"ThreadingModel"="Apartment"