I acquired about a 5yr old laptop that I have fresh installed win7x86, removed all non-essential services and optimized the computer. I installed reaper and adobe audition on it.Issue: Using a Fast Track pro to record some guitar I got popping noises. Not standard crackling you get from latency but almost static like bursts of different loudness. Almost like a geiger counter but the bursts are more scratchy/noisy.In reaper the noise was showing on on the ouput level. The Fast track worked fine in other laptops(even much older ones). Recording does not record the pops. Therefore the issue is either in the software or the laptop itself.The laptop does not have a battery so I have to run it off the power supply. The supply itself may be the cause of the problem. I repeat, this not latency noise(stuttering, etc) and I've never heard that type of noise before except possibly from radio interference. (it almost sounds like tv static or ham radio noise but short bursts(around 1/4th of a second). It's almost as if the capacitors are failing in either the power supply or the laptop. I'm thinking that if I had a battery to check it then it would be ok but I don't. While it does record fine it's useless for any serious playback. Also, it could be the asio drivers on that particular machine but I know the exact same device works fine on another older laptop.Any ideas?I should also mention that the built in sound card does not have these issues.