If you cannot boot into normal Windows mode at all, you may need to run through the following steps through Windows Safe Mode.
This action can help to fix poor performance or software errors and does not erase any of your data, like pictures or music.
If you cannot get into Normal or Windows Safe Mode restore system registry settings through the Recovery Console.
A computer's system restore point may have been deleted for one of the following reasons.
It’s a good idea to know what all programs will be uninstalled when you restore your system using a specific date.
To know affected programs, select the restore point that you want to use to restore your system, and then click Scan for affected programs.