I don't know if this has been answered before but I didn't find it anywhere so:
If u have that anoying user.exe error when you press a key, what you have to do is:
1. Go to regedit
2. Erase HKEY_CURRENT_USER\Software\1964emu_070
3. Restart the computer
4. Play 1964 (the best emu ever) ;)
I start 1964, I run a Rom, everithing is doing great but when I press any key I Get "error in User.exe" and the thing goes down. It doesn't seem to make a diference chosing other plugins...
Where did I go wrong?