Hey, Leadfoot.  I get this all the time, especailly with a mini Akai keyboard (LPK25) that sits on my desk for quick note entry.
 
If I figure anything out, I will post here.
 
One clue may be that the only logical place for me to plug this in is in the front of the rack-mount PC, but i think that is a differenst speed than the ones in the rear.  I will validate that with NirSoft's USBDeview freeware.

If you ignore the notification from SONAR does the device continue to work?
i.e.  Click NO in response to the prompt.

Thank you konradh.
BTW musicman100 I didn't mention the Delta 1010 because it's a PCI device. But thank you for the suggestion.
Noel, sometimes it continues to work and sometimes it doesn't. I reinstalled the latest drivers for everything, and that's improved the problem. It still gives me the message, but I think everything is still working at this point.

Okay, I lied. It is not still working. I just noticed a hotfix (244) that is supposed to help the problem of the message popping up. I guess I'll try that and see if it helps anything.

I've seen this happen. Had a friend with an M Audio fast track Pro that kept getting "lost" by Sonar. He solved it by getting a powered USB hub and plugging it in the front of the tower. I would follow what Jim R is saying, it really does sound like a power issue with all the devices you have.

I just got my Faderport 8 and had the same problem.  I went to Presonus User Forums and found this fix:
 
Unplug the Faderport USB cable from computer.
Turn off Faderport
Restart computer
Plug Faderport USB into computer
Turn on Faderport
 
Faderport should connect and load UC.
 
Worked for me.  Hope this helps.
 
Tony

I had a similar issues some time ago and replaced all the drivers.  BUT first, I had to go through every possible place and delete any line mentioning the particular sound module etc.  It was tedious, but it solved my problem.  I believe that something I installed...maybe a vst I was trying or whatever screwed up the drivers.  Anyway it did solve my problem.  I would go to your sound module developers site and ask them specifically what to get rid of before you re-install the new drivers.  good luck.  It is a frustrating experience, but also a learning one, as most of these issues are.

I know the OP has Windows XP but like a few others here, I see this message frequently on my Windows 10 machine with the latest SONAR Platinum.  I have my power settings set to have USB power always on, CPU at 100% and hard drives always on.  When I see the message in question, it's because I was away from my computer for more than 30 minutes, and my monitor (screen) is set to power off after 30 minutes of non-use.  Of course this isn't an audio device, but it seems to be the only thing on my system that could trigger the message. 
 

Assuming this is a desktop system as you mention a PCI device earlier in the thread.
 
Try adding an extra USB connector bracket. However, make sure internally to cable it to a connector on the motherboard that is not already associated with another USB output so that it doesn't have to share resources. Note I'm not referring to adding a PCI USB card (although thats an option), I just mean a USB socket on a bracket that you can cable directly into your motherboard. Obviously this won't work if you don't have any spare USB sockets inside your PC.
 
Most USB panels share power and bandwidth. Using the above method you would provide yourself with connections that are powered separately from your other devices and may cut down on low power issues when you have several devices connected.
 
Hope this helps.

That message shows when another audio driver takes over the audio driver you where using. So to me this is simple. Your main audio is the Delta 1010 which you normally should use ASIO mode.
But because you also are using the line 6 you therefore use WDM mode which supports using 2 audio devices. Forget all those other devices, they are not audio and do not come into play.
 
 
SO this is a simple matter of losing the driver for the Delta. 
If you not using it, disconnect the line 6 and switch to ASIO mode for the delta and see if this goes away.