It's me again, sorry I did not reply before.

I was asked to describe the noise my rockfrog makes when connected to my laptop and running guitar rig 4 and to run a latency-check software. Well, the noise is usually crackling, but it is not always the same. At some moments it 'calms down', but it can also get terribly annoying in matter of seconds after it it stops. Some other times it makes my guitar sounds very metalic and a strange kind of out-of-tune harmony can be heard as I play... it sounds awful, of course.

In regard to the latency-check software, during the tests I noticed that every forty seconds (approximatelly) the graphics turn red and they reach 6.500 (also approx.). After that it turns green again and repeats...

The results say: 'Some device drivers on this machine behave bad and will probably cause drop-outs in real-time audio and/or video streams. To isolate the misbehaving driver use Device Manager and disable/re-enable various devices, one at a time. Try network and W-LAN adapters, modems, internal sound devices, USB host controllers, etc.' Could you please help me?
Looking forward to your response,
Mariano