Having recently upgraded to
Windows 7 64 bit, I experienced this issue with ROOST and DH. Anytime something happens with a Creative product and/or their drivers it means nothing but grief. I eventually got it to work by following this I found on the Creative Forums (courtesy of DeeBee) with a couple of things else to do listed afterwards. I assume it will work with KF as well for me, but haven't actually tried it.
I have the X-Fi XtremeGamer Fatal1ty Pro
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From those forums:
For all of you with the problem with x64 vista or windows 7 -> creative x-fi -> system driver uncheck-> bsod
Go to the http://support.creative.com and find your x-fi card.
Install the latest drivers for your card. Make sure you get the "Creative Software AutoUpdate"-program with the driver package.
Then download the "Product identification module update". This fixes the "Creative Software AutoUpdate" so that it will recognize your x-fi card.
Now use "Creative Software AutoUpdate" program (start menu) to update your drivers and ESPECIALLY install Creative Alchemy.
Reboot
Start "Creative Software AutoUpdate" again and update the just installed Creative alchemy to version 1.41.02. *Note* it doesn't seem to work with previous versions.
Reboot
Open Creative alchemy and push the "add" button. Game title= Red Orchestra. Check game path and put your "red orchestra\system" folders path there. example "C:\Program Files (x86)\Steam\steamapps\common\red orchestra\System"
REMEMBER to move red orchestra to the "Alchemy enabled" side of the program.
Now start Red Orchestra and enjoy surround sound even with system driver ticked.
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I
must use it with System Driver "ticked" otherwise I will still get a BSOD after 5-15 minutes. I am set using HD/3D with EAX, but it seems to work with those other choices as well.
I had a problem with the Creative Console Launcher, it was crashing the Console when I closed it and defaulting back to 2.1 Surround Sound. I had to set the compatability setting for that program to the latest Vista setting. Before doing this, I was only getting 2.1 Surround Sound in the game and it would crash the computer after so many minutes with or without the system driver ticked. Also, it sounded just terrible until it crashed. Not sure how this may or may not be related.
I am using the latest set of drivers from Creative for Windows 7 64bit.
If there is much of a difference in sound quality because I have system driver ticked, I don't really notice.
Previous to doing any of this, ROOST would crash with or without the system driver ticked. I know, doesn't seem to make sense.
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I don't know if this will help anyone, maybe I just got lucky, but for now I seem to have things working.