This is close to the worst software inclusion ever. I have been experiencing this problem of my laptop constantly rebooting (when unattended) for months. For a while it got better but then whenever I ran the cleaner program (not the driver update), the problem started again. There is no fix because the time I ran the initial driver update (have only run it once) it did not create a restore point as their support claims it does. Essentially I see the only fix to this mess that CCleaner created is a complete reinstallation of Windows. I find that completely unacceptable but it seems that the messages here are that CCleaner are unable to provide a fix to the problem they singularly created for so many people. Whilst I find the rest of the software to be very useful, I will be rating CCleaner a "0" or "1" due to this major defect that they have not addressed