Software Write Blocking
SAFE Block is a software-based write blocker that facilitates the quick and safe acquisition and/or analysis of any disk or flash storage media attached directly to your Windows workstation. It is proven to be safe, and significantly faster than hardware write blocking solutions.
Windows Forensic Boot Disks
SAFE (CD or USB) boots a computer to a forensically sound (write blocked) version of Windows that serves as a platform for all popular Windows acquisition and analysis tools. It's support for all Windows drivers allows it to boot many more kinds of computers, laptops, and servers than Linux forensic boot disks.