New
#21
If there were no CBS.log created, the CBSPersist couldn't be created, since they are purely the compressed content of 'old' CBS.log files.
There is always the possibility that you have a 'cleaner' installed that wipes the log file at every boot - but I think it's unlikely, since the Persist files appear to be current.
The problem here appears to lie with the Windows Update Agent install - which seems to have barfed part-way through.
Please run the CheckSUR tool again - it may give us more clues to the source of the problem - and post the CheckSUR.log file