I've had memory access problems before. Which brand of memory do you have?? That cheap stuff usually has flaws (replaced mine with Mushkin = no problems ever since).
Try uninstalling, rebooting, installing, and then rebooting CloneDVD (just in case...nothing to lose). Try running CDVD again - if you get the blue screen, reboot and close other program processes in the Task Manager. Let me know what happens.