I have also problem with my sound card. I've been using XP on my "old" computer. Recently, I decided to upgrade to Windows 7 64b, but from the moment I installed new system, windows can't detect sound card. Device manager shows yellow triangle over Sound Adapter. It shows Unknown Device when double clicked. My sound card is Creative Sound Blaster X-Fi mX Xtreme Gamer. Before I installed Windows 7 64b, I installed Windows 7 32b for like 15 minutes (took another DVD, lol), and there was exactly the same problem. Also, driver
can't be installed, as driver installer can't see the device.
Looking forward for any tips'n'trics, thx