1. im thinking about backup the small system partition, Windows 8.1 & win 7 (Both x64 os) but i heard that there are always issue even when hardware is not change after backup & restore os. which is better clean install or backup with utility like acronis true disk? 2. Which utility is better for such task macrium or acronis? 3. is it possible to backup system without installing these software(some boot disk) means when i restore system it won't restore installed utility (just activated OS with no extra apps)?