Ok. First, the freeze it's not when uncompressing the rom but when listing all the rom names that are in the rom folder. I have tried disabling databases, erasing all bad paths that importing an emulator config had left, etc. And it sitll doesn't detect that roms are goodmerged for some emu and it still freezes. I have upload a log of a session that froze when trying to list master system roms. It also shows that my computer is not the latest one but it's still good enough (it's an amd san diego 3700 + 1024 MBs ram +7800gtx). Thanks log.txt