Windows Installer registry permissions
This problem is caused by a botched hotfix integration by nLite. The hotfix is KB893803 aka Windows Install 3.1 v2.
- Change Administrators and SYSTEM to "Full Control"
- Add Everyone and give "Read" permission
- Click Apply
- Click Advanced
- Check "Replace permissions entries on all child objects with entries shown here that apply to child objects"
- Click OK, then Yes.
- Click OK, close regedit.