My USB ADSL modem loses power (supplied by the USB port) frequently, mostly during downloads, and on rare occasion, while basically doing nothing. One possible cause of the problem might be that the PCI to USB controller and sound card (actually, an onboard sound chip) share the same IRQ: 11. I freed up IRQ 5 by disabling COM2 in both the BIOS and Device Manager, but Windows won't let me change the sound card's IRQ. I was able to change it in Safe Mode, but after rebooting in normal mode, it was back at IRQ 11. I removed the sound card in Device Manager, hoping that when I rebooted Windows and it found the sound card, it would assign it IRQ 5, but no such luck. Any suggestions?