PPSSPP crashes at launch

[LunaMoo]

XP64 might run, but only 32 bit version of PPSSPP(if it even comes with WOW64 emulator). AMD64 version of PPSSPP isn't and will never be supported on this outdated OS and trying to use it is probably your problem;p.

Also for radeon HD4870 no idea about any driver mods and their weirdness, but most official drivers will not run in OGL well. It might run better with old 11.11a or alike drivers, otherwise you might need to use less compatible D3d9 backend.