With your excellent explanation the problem has been solved. The 'Task Name' stated in my original posting as "SqmUpload_S_1_5_21_22..........." of course was abbreviated. Using Windows PowerShell (which more easily allows copy, rather than the more primitive command window was used to obtain the full name thus:
PS C:\WINDOWS\system32> schtasks /query /fo list
..
..
HostName: CCCLUSTER-EXTRA
TaskName: \Microsoft\XblGameSave\XblGameSaveTaskLogon
Next Run Time: N/A
Status: Ready
Logon Mode: Interactive/Background
ERROR: Task cannot be loaded: SqmUpload_S-1-5-21-2257296852-2292502068-3452482532-1000
ERROR: The system cannot find the file specified.
Copying the TaskName and pasting it into the command below I attempted to delete it:
PS C:\WINDOWS\system32> schtasks /delete /TN SqmUpload_S-1-5-21-2257296852-2292502068-3452482532-1000
ERROR: The specified task name "SqmUpload_S-1-5-21-2257296852-2292502068-3452482532-1000" does not exist in the system.
PS C:\WINDOWS\system32>
As you suggested this might fail, requiring me to instead make registry changes. Following your explanation I located the TaskName in the registry and it's associated GUID which was:
{25D9791C-D8C3-4133-990B-B3EA34ACC77C}
Using the 'find' (CTRL-F) function in Regedit starting with the 'Boot Key' and continuing through the 'Tasks Key' I found and deleted the entries, which were found in the Logon, Plain and Tasks keys, for this GUID.
After closing the Registry Editor, I proceeded to check the Task Scheduler and the error no longer occurs.
Regedit32, I was impressed by the thoroughness of your explanation and thank you!
One question..what software did you use to provide the images of the registry editor screens with the useful added graphics (in red)? That was very helpful!
Ron Stordahl