How can I open more than 15 files at once on Windows 7?
Solution 1:
Open regedit and navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
Add this case-sensitive DWORD (32-bit) key:
MultipleInvokePromptMinimum
Set the value to
16
P.S. 16 is not a hard number, but actually indicates "unlimited", so putting in 17 probably will not work.