Hi,
Please try to run following commands one by one and then DISM again to repair corrupted system image:
net stop wuauserv
cd %systemroot%\SoftwareDistribution
ren Download Download.old
net start wuauserv
net stop bits
net start bits
net stop cryptsvc
cd %systemroot%\system32
ren catroot2 catroot2old
net start cryptsvc
If DISM fail to repair corrupted system image or it encounter the error again, please run System file checker to do further troubleshooting:
Run cmd as admin:
SFC /SCANNOW
Can you see VPN connect on connection pane?
If not or you get message that some corrupted files failed to repair, post back the cbs.log here for our research.