Just a friendly reminder at how easy it is to gain access to your files if your machine is running. I locked myself out of a Windows Vista virtual machine I was playing with (It wouldn't allow me to log onto the domain and I didn't have the local admin password). After some quick Google searching, I ran across the free Offline NT Password and Registry Editor. You boot to a light distro of linux, it copies the SAM database, asks what you want to do with the password (in this case, clear it), saves the SAM database back, and presto! You're in.  This also illustrates the importance of implementing full disk encryption.