Cannot rename keys in HKLM\HARDWARE\ACPI with Registry Editor. However if ACPI key gets renamed to some other name and back, then the keys DSDT, FACS, FADT, RSDT can be renamed without problem.
Since 0.4.15-dev-243-g4d1cd723175 when renaming DSDT, FACS, FADT, RSDT, the following error appears:
Using regedit.exe with ulib.dll from Windows Server 2003 leads to a similar error:
When trying to rename these keys in Windows 2003, using both native and our regedit.exe, no error happens: