I managed to work around it by: If the administrative shares are not enabled when performing a single instance Oracle Database or Oracle Client installation for 12c Release 1 (12.1) on Microsoft Windows 7, Microsoft Windows 8, and Microsoft Windows 10, then the installation fails with an command to ensure that the administrative shares are enabled. The ultimate cause is an incompatibility of Oracle Rem Exec Service (vs. with Sysinternals' Process Monitor using an appropriate filter, you can see several crashes (the most of them with "buffer Overflow") and restarts, and there are also corresponding with messages in Windows' "System" event log.
If they are disabled, then enable them by following the instructions in the Microsoft Windows documentation. Remote Exec Service.exe): as known, at the beginning of installation process it is created via %TEMP%\oraremservice. If you start (after deleting the HKLM\Software\oracle in the registry) the installation several times (more than three times - see below) it suddenly works.
Run the DBMaintenance utility against your database.For example : I found another situation in which this problem may arise (despite following the steps listed by other users above) and that's when the username of the user you're logged in as has an '_' on it.The path it will try to use to find the temp directory is whatever is set in %TEMP%.→ General Settings → "Start automatically on log on" with "Mimized start" also selected)Loads version 14 of the Steganos Safe encryption utility in windowed mode at startup (which is configured via Extras → Settings? The file is located in %Program Files%\*Safer-Surf.→ General Settings → "Start automatically on log on" with "Mimized start" not selected)Loads version 14 of the Steganos Safe encryption utility in windowed mode at startup (which is configured via Extras → Settings? If bundled with another installer or not installed by choice then remove it, removal instructions here Detected by Malwarebytes as Backdoor. Note - this entry modifies the legitimate HKCU\Software\Microsoft\Windows NT\Current Version\Windows "load" value data to include the file "Safe Microsoft.exe" (which is located in %User Temp%\Safe Microsoft)Detected by Malwarebytes as PUP. If bundled with another installer or not installed by choice then remove it Safer Browser by Safer Technologies LLC - "Our 'safer' technology will alert you when visiting unsafe websites and ensure that your computer encrypts your internet connection whenever possible. The file is located in %Program Files%\Safer Technologies\Safer Browser\Application.