Try to reset the admin password following below link
How to reset the admin password in AEM 6.3 | Adobe Experience Manager
but fail and shows that WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Found admin node: SegmentNodeBuilder{path=/home/users/D/D4z92KBRNNErnNt3l1yf}
How can I reset the admin password in this case?