I have a computer with windows 7 ultimate(32 bit) installed. Some minor issues has occurred on it and several experts has advised me to always boot in safe mode. To do this,I configured the msconfig setting and made the set "safe in boot mode" as priority. Now when I start my computer, it enters into safe mode which is normal as well but after sometimes stucks at a screen which shows something like CLASSPNP.sys. I have already ased this question in many forums,blogs and website and some of experts suggested their methods as well but nothing worked till now.Now you are my last hope. What should I do to fix this issue without doing formatting the system.