Soyo P4X400 with onboard audio, 768MB Ram, 310Gb Storage, ADSL When this problem first started, I was using the onboard sound system, CMI8738/C3DX PCI Audio Driver. Later, I changed the sound card. See below. My original problem occurred when my wife was playing Spades or Hearts on Microsoft’s Zone. (And this is the only time the problem has ever occurred.) The sound generated by playing a card would go away, then the speakers would, at a regular interval, make a sort of clicking noise. The game would continue, with the sound messed up, but then when the game was closed, I would get a BSOD mentioning the CM Audio System. (If I minimize the Zone game, I can check my email, play solataire, or anything else I have tried, and everything, except the sound, works until I close the Zone game.) I tried several versions of audio drivers, all to no avail. My wife has inquired of several people on the Zone if they have any problems such as this and no else has. I removed the onboard sound hardware from the Device Manager (told it not to use it in this configuration) then purchased an AOPEN AW840 sound card, thinking I would get a different driver with it. It came with the same Cmedia driver CMI8738/C3DX. And the problem has changed slightly. Now, when the problem occurs, again only while playing Hearts or Spades, the noise is slightly different but with the same results. Close the game, get a BSOD. If I remember correctly, I have had BSODs mentioning the Audio System since I installed the AOPEN sound card, but now, the CMI audio system is not indicated in the latest BSODs. The Stops I have written down are listed below: Ox000008E (0xC0000005, 0xF6E88299, 0xF34DE860, 0x00000000) Bad_Pool_Caller 0x000000C2 (0x00000040, 0x80000000, 0x80000000) 0x0000007E (0x00000005, 0x8054AA32, 0xF3033C74, 0xF3033970) I have run memory test for hours, swapped all 3 memory modules into different slots, run more memory tests for hours, all with no errors. I have 3 minidumps from the BSODs and spent some time trying to decipher them to no avail. If someone could analyze them, maybe I would have a clue as to what to do. I did a Repair on XP and that did not help.