Would you mind doing this?
Open an elevated command prompt and type is
vssadmin delete shadows /all
Then type Y to continue.
It should say "Successfully deleted X shadow copies." where X is a number
This will forcibly delete all restore points.
Reboot and report back please.
Open an elevated command prompt and type is
vssadmin delete shadows /all
Then type Y to continue.
It should say "Successfully deleted X shadow copies." where X is a number
This will forcibly delete all restore points.
Reboot and report back please.