Go to : Control Panel>System and click on the Device Manager tab. Then double click "computer" at the top of the window. You'll get a listing showing what devices are functioning on which IRQs. Don't worry if you see "IRQ Holder for PCI Steering" . . . that's not sharing. You may have a problem, however if you see your soundcard sharing an IRQ with your Modem or , even worse, if it's sitting on IRQ 9 with your USB Host Controller. This can be a definate source of Pops & Clicks.
You can try to assign it another IRQ within control panel by going to your device under "Sound, video and game controllers", double clicking the device and going to the resource tab. Chances are that Windows won't let you change it though.
There is another way, however, to trick Windows into reassigning it. It is complicated though.
First, pick an unimportant IRQ . . . one that isn't used by a "must have" device like your keyboard.
Usually 3, 5, 10, & 11 are the best choices. Go to back to that same device manager tab and double click "computer" again. This time go to the reserved resources tab and reserve an IRQ, let's say you reserve IRQ 10. Now go to your soundcard and disable it! Yeah, go ahead . . just hit properties and check the disable box. Reboot the computer and now IRQ 10 is no longer used and your sound card is disabled.
Next, go back to the reserve resources tab and un-reserve IRQ 10 . . . delete the reservation. Next,
go back to your soundcard properties and do two things. One, enable it again and two go to the resources tab and uncheck the box that says "use automatic settings". Reboot again and cross your fingers. Chances are that it will find the newely free IRQ 10 available. You might have to try this several times before your soundcard finds a happy home alone.
Regards,
PAPicker