Yeah, I'm still having this problem. No one responded so I figured it was either being worked on or no one knew any solutions.
I actually bought a Microsoft Surface Pro and it is having the exact same issues as the PC I described in the OP.
Hrm, I realize now that I could have been a bit more specific in the answers to the questions in the OP. I will answer them again...it's been awhile anyways.
1) Are you interested in using TeamViewer (more info below)?
Sure, why not. Name a time and I'll see if I can swing it.
2) What is your OS?
This happens on Windows 7 and Windows 8. No differences.
3) What is your browser?
This happens on Internet Explorer 10 and Firefox 21. No differences.
4) Post a link to one game you are having trouble with:
Super Mario Bros 3 - Nintendo Entertainment System Keep in mind it happens with all NES, Sega, and N64 games.
http://www.retrouprising.com/game-menu/game/11707/
http://www.retrouprising.com/game-menu/game/3679/
http://www.retrouprising.com/game-menu/game/125/
http://www.retrouprising.com/game-menu/game/7617/
http://www.retrouprising.com/game-menu/game/3706/
http://www.retrouprising.com/game-menu/game/10448/ Yes, I clicked on a random game. =p. Anyways, I'm not sure if Amiga is Sega or not. It's on the Sega row, so I included it.
5) What Play Mode is causing the problem? Example ArcadeOX Score, Java Full, etc.
ArcadeOX Full Mode and ArcadeOX Score Mode. Not real sure why I said that the Java modes don't work. They must not have at that point.
6) Has it ever worked correctly before?
Yes, I seemed to have random bursts where it would work fine, but that hasn't been for a long time. I actually completed Faxanadu. Sorry that I can't be more specific. I have no idea why it randomly works.
7) Describe the problem:
The NES error: "DirectInput8Create() failed! Exiting application."
The N64 Mupen64Plus error: "Could not create DirectInput Object for whatever reason."
The N64 1964 error: "Error. Game did not load."
The Sega SMX error: "DirectInput Init Error #1. DirectX 7.0 or higher required."
The Sega 32X error: Same as above.
The Genesis error: Same as above.
The Game Gear error: Same as above.
The Amiga error: "Failed to initialize DirectInput"
Some additional things:
I have DirectX 11 on my tablet and on my PC.
I have no gamepads or JoyToKey or anything like this on my tablet or on my PC.
Disabling my antivirus programs does nothing.
If I go out and download emulators and ROMS, they work fine. It's when I try and run them on this site that they don't.
---------- Post added at 11:40 AM ---------- Previous post was at 10:05 AM ----------
Oh, one last kinda important thing. Everything works great on my Dad's computer at work. The only difference I can see between that computer and mine is that my Dad's has an integrated video card instead of something like a NVIDIA or an ATI. I beat Battle Kid on my Dad's computer (with save states, mind you...I'm not that much of a masochist).