First and foremost, system info:
RetroArch Log
systeminfo
command output
When I launch RetroArch, I get an empty console window and a small blank window. It essentially retains whatever picture was under it the moment it was opened. As far as I understand, this is supposed to be the main RetroArch UI, because pressing F makes it go fullscreen and double tapping Esc makes the window go away, while single Esc presses do nothing.
I’ve installed DirectX 9 from Microsoft’s official offline redistributable installer and RetroArch from RetroArch-MSVC10-Win32-setup.exe. I’ve tried all the listed available video drivers (gl, gl1, d3d8, null), to no avail. I’ve also cycled between rgui, xmb and ozone for every driver. That didn’t help. None of the configurations worked, all drivers except null showed the same blank window.
Rebooting several times and reinstalling DX9 didn’t help, too.
AFAIK nobody has encountered such an issue before, google searches didn’t net anything except another XP problem about a missing manifest and an “Invalid argument” error, both seemingly irrelevant.