"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
This message may display within MDTools if it doesn't have enough permissions.
To give the necessary permissions:
Open File Explorer and go to your C drive.
In the View tab at the top, click the Hidden Items check box.
Open the Program Data folder.
Open the VEST folder.
Right click on the MDTools folder.
Select properties.
Select the security tab.
Click Edit.
Click the check boxes to allow on each item.
Click Add and type "everyone".
Click OK.