Acronis Support frequently recommends using the Windows Sysprep tool before cloning a disk that contains the system to a new disk. (Most recently Tatyana Tsyngaeva in a reply to post by Jon_Cosby on June 16). I have difficulty in understanding why Acronis Support makes this recommendation. It should not be necessary to use Sysprep if the only thing that is changing is the system disk. I quote from the Microsoft TechNet article on this subject: - One of the underlying purposes of Sysprep is to deploy Windows across PC's that have different SID's. In the case of a single PC where the old system disk is being cloned to a new system disk, the PC SID will remain the same and there should be no conflicts within Windows in accepting the new system disk as part of the existing system configuration. However, as Acronis Support are the experts on their product, I believe it would be helpful if they could explain why the Sysprep process is recommended when using the TI9 clone utility.