On 5 Aug 2018 02:32:03 GMT, Arlen Holder wrote:

12. Then I selected a score of files & finally right clicked to select
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Here's how to add a 32-bit DWORD to open more than 15 files at a time.
- HKCU\Software\Microsoft\Windows\CurrentVersion\Exp lorer
- Name : MultipleInvokePromptMinimum
- Type : DWORD
- Default : 15 (decimal)
- Change to: 100 (decimal)