I rebuilt my system from scratch a couple of weeks ago, using a brand new 250GB SSD [SanDisk SDSSDHP256G (256.06 GB)] as system disc. I have a couple of other mechanical discs in the machine for data etc. I started with a clean installation of a properly-licensed retail copy of Win7 Professional 64bit, with 12GB of memory. I have used HDM for a number of years. I wanted to take an image of the new system installation, and check the configuration of the mechanical discs [which have a number of partitions]. On starting HDM, I see that the system partition is labelled "invalid". Windows backup failed to create a system image. Belarc and Windows report no problems with the disc, but I am obviously worried. Does anybody have any ideas?