I first activated win7 (7600-ultimate) with Daz´s 1.7.4 version of the loader. I also have Vista sp2 installed in another disc (showing as different partition) and re-activated it with it as instructed elsewhere. It would usually choke when doing the MEM test (while loading BIOS) and afterwards randomly within Win7, especially when surfing windows explorer and using firefox. I upgraded to 1.7.7 version and the same goes on. I tried using alternative mode but still the same happens: I can boot (although loading chokes a bit), I can surf pc, but system hangs every once in a while. Is there a way to fix this? How can that be fixed? Thanks in advance.