Failed to create restore point (Process = C:\Windows\system32\rundll32.exe /d srrstr.dll,ExecuteScheduledSPPCreation; Description = Scheduled Checkpoint; Error = 0x80070422).
It turned out there was a bad entry in the system protection settings for my Windows 7 workstation. To fix this I went to System settings and clicked the "System protection" options. In the "Protection Settings" box, it showed protection off on "Local Disk (C:) (System)" and a bad old entry of just "C:" had it on. I turned the bad entry to off and it went away. I then turned the valid entry to On.