I am using Vista Home Premium with an HP Pavilion 8180. It has a 500gb drive which I have reduced to 321 gb with Vista’s ‘shrink volume’, making a spare partition, but I would like to reduce it further so that I can backup with ATI (whole partition) and make smaller backups. I am assuming that the backup will be smaller if there is less free space as the program must record all the free space somehow – is this true? I used ADDS 10 to attempt this, from Windows, by creating more free space on the spare partition, taking it from the system one. Although it appeared to be working, when Windows attempted to restart it reported errors and tried to do a repair. Eventually it suggested a system restore which did solve the problem, with the partitions unchanged. Is this because I tried it from Windows and should have booted from the Acronis CD? Is this the same as the Acronis Bootable Media Builder disc? A lot of questions! You can see that I am new to this!!