What is the correct Real Tech driver for the Dell Precision 670? It only says AC97 Sound Blaster Emulation in the manual. I have tried downloading and using the WDM_A406 driver from Real Tech and it loads half way, then I get the blue screen. I found the file it needed is also a Windows file ALCXWDM.SYS so I I direct it to that and it loads till the very end and then blue screens me again when it gets to a final exe. file. It has all the original components in this system and arrived with out OS or disks. The first time I set it up with XP 32 bit , the sound worked no problems, then I tried to redo it with the XP pro 64 bit OS (it is a 64 bit system) and lost sound and wifi ability that I had. So I went back to the 32 bit version again and still no sound or wifi ... can someone help me please?