If Registry Healer raises errors while scanning the registry then please try the following:
1. Run the program.
2. Open the Advanced Settings dialog, Appearance tab.
3. De-select the "Scan several registry keys simultaneously" option.
4. Test the registry scan.
Registry Healer will use less resources while scanning the registry.
If Registry Healer raises errors while scanning files for corrections then please also de-select the option "Scan several folders simultaneously" under the "Files scan" group.
Registry Healer will use less resources while scanning hard disks.
If the above step didn't solve the problem you can try to deselect the "Show Progress Bar" checkboxes both under the "Registry scan" and "Files scan" groups.