BoClean spikes to 40- 70% CPU usage every ten seconds when it checks the registry. It makes my XP Pro system so unstable that I cannot use it. I have never seen an application cause this much instability on XP. I can reproduce it so I know it is BoClean. My system gets rapidly to where menus (such as Start and Quick Start) flash when I click on them and then close instantly. Anything minimized in the taskbar has great difficulty being maximized and closes almost instantly. My mouse becomes unresponsive. I could go on but you get the idea. This is XP Pro on a fast 3.0GHz box with 1024 RAM yet with BoClean running, I feel like I am on my old 98SE box, and in a situation where my resources are perhaps at 5%, and I have tried to open an application that needs 6% resources. That is what this feels like and acts like. The symptoms are tolerable as long as I keep RAM usage BELOW 400MB. The moment I start a virtual PC or do anything that puts RAM usage at 900MB or above, I can't use my computer if BoClean is running. I have read that this EXCESSIVE CPU usage every 10 seconds might be due to a conflict with ProcessGuard. I would like some opinions as to why BoClean is gobbling RAM and also making my usually very stable XP Pro box so unstable that I have to reboot VERY frequently. I have no problems whatsoever running this box with 950- 1000MB physical RAM in use as long as BoClean is not running.