When the security level is high, unsigned macros will not run. This setting controls whether or not the user will see an alert when a macro is blocked from executing because it is unsigned.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Office\12.0\Excel\Options |
| Value Name | DisableHighSecurityMacroAlert |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |