Already been run - no SFC errors in the CBS.log
The 0xc8000247 error does bring another possibility to mind, though....
Please run an MGADiag report and post the results....
Please follow this tutorial and post an MGADiag report - then we can see what the problem is.
Please also state the Version and Edition of Windows quoted on your COA sticker (if you have one) on the case of your machine (or inside the battery compartment), but do NOT quote the Key on the sticker!
Ignore errors produced when clicking on the Copy button - they simply mean that the tool could not create the backup files for some reason. The data is still copied to the clipboard for pasting to your response.