white static noise when recording stoped in 10.2

[Bad Vibe Studios]

Has any been experiencing any white noise or noise issues when recording a track then stoping it. Looking at the wave it looks like a square wave. I'm on a mac pro 16 gigs, 003, all internal drives. Wd black series with plenty of space and a raptor with min space. It happens randomly. I've done all the trashing pref. I did the uninstall of all previous versions and did a clean install of 10.2. And my mac is optimized to run only protools. It's never been connected to the internet. All updates for plugins are up to date. Any suggestions would be much appreciated.